Terminal case, mobile terminal, and mobile terminal assembly including the terminal case and the mobile terminal

ABSTRACT

A mobile terminal assembly is provided. The mobile terminal assembly includes: a terminal case; and a mobile terminal detachable from the terminal case, wherein the terminal case comprises: a case body; and a lens cover openably disposed in the case body, wherein the mobile terminal comprises: a display unit; a camera module including a camera lens disposed at a position corresponding to the lens cover; a lens cover sensing unit sensing whether the lens cover is opened or closed; and a control unit configured to execute a camera application on the basis of whether the lens cover is opened or closed.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims priority under 35 U.S.C. 119 and 35U.S.C. 365 to Korean Patent Application No. 10-2013-0051523 filed on May7, 2013 and 10-2013-0064710 filed on Jun. 5, 2013 which are herebyincorporated by reference in its entirety.

BACKGROUND

The present disclosure relates to a terminal case, a mobile terminal,and a mobile terminal assembly including the terminal case and themobile terminal.

As the touch recognition of a touch screen and a user interface therefordevelop, the touch screen becomes used for a mobile terminal generally.Additionally, the touch screen becomes larger and a bezel part of amobile terminal becomes thinner. However, the touch screen of a mobileterminal may be damaged due to the impact of crash. According to therecent trend, that is, as the touch screen becomes larger and the bezelpart becomes thinner, such risks may be greater.

Accordingly, users may use various types of terminal cases so as toprotect the mobile terminals from such risks.

A typical terminal case includes a terminal coupling part detachablefrom the rear of a mobile terminal and/or a front cover part coveringthe front of the mobile terminal.

The terminal coupling part covers the rear of the mobile terminal. Atthis point, a portion corresponding to a camera lens is generallyincised to expose the camera lens to the outside. Accordingly, even whena terminal case is coupled to a mobile terminal, since a camera lens atthe rear of the mobile terminal is exposed to the outside, a camera lensscratch occurs. Therefore, the quality and performance of the cameralens may be deteriorated.

Moreover, in order to prevent this, as a means for protecting the cameralens is attached to the mobile terminal, the volume of the mobileterminal becomes larger and the external design quality becomesdeteriorated.

Moreover, when shooting by using a camera module built in a typicalmobile terminal, due to a time for turning on a display unit andsearching for and executing a camera application, a user may miss themoment that needs to be taken for a picture immediately.

Moreover, when a front cover part is equipped at a terminal case, it mayprotect a touch screen stably compared to another case. However, whenthe front cover part is closed, a user cannot check the contents on thetouch screen of the mobile terminal and cannot provide an input throughthe touch screen of the mobile terminal. Accordingly, in order to checka simple content or provide a simple input, a user needs to open thefront cover part, and then check the contents displayed on the touchscreen or provide a touch input inconveniently.

SUMMARY

Embodiments provide a terminal case, a mobile terminal, and a mobileterminal assembly including the mobile terminal and the terminal case.

In order to solve the above-mentioned issues, a means for protecting acamera lens of a mobile terminal is equipped at an additional terminalcase detachable from the mobile terminal, so that the camera lens may beprotected while maintaining the slim and elegant appearance of themobile terminal.

Additionally, by promptly executing a camera application so that instantswitching to a capture mode is possible, the damage of a lens part of amobile terminal may be prevented.

Additionally, the contents displayed on a touch screen may be checkedwithout opening a front cover part for protecting a touch screen andalso a touch input may be possible.

In one embodiment, a mobile terminal assembly includes: a terminal case;and a mobile terminal detachable from the terminal case, wherein theterminal case comprises: a case body; and a lens cover openably disposedin the case body, wherein the mobile terminal comprises: a display unit;a camera module including a camera lens disposed at a positioncorresponding to the lens cover; a lens cover sensing unit sensingwhether the lens cover is opened or closed; and a control unitconfigured to execute a camera application on the basis of whether thelens cover is opened or closed.

In one embodiment, provided is a mobile terminal detachable from aterminal case including a rear incision part and a lens cover capable ofopening or closing the rear incision part, the mobile terminalcomprising: a display unit; a touch input unit receiving a touch input;a camera module including a camera lens disposed at a positioncorresponding to the lens cover; a lens cover sensing unit sensingwhether the lens cover is opened or closed; and a control unitconfigured to display a preset user interface through the display uniton the basis of whether the lens cover is opened or closed.

In one embodiment, provided is a mobile terminal detachable from aterminal case, comprising: a rear incision part; a lens cover capable ofopening or closing the rear incision part; a button part movablyprovided; first and second polar magnets coupled with the button part; adisplay unit; a camera module including a camera lens disposed at aposition corresponding to the lens cover; a lens cover sensing unitsensing whether the lens cover is opened or closed; a case couplingsensing unit sensing a position of the button part of the terminal casethrough magnetic fields of the first and second polar magnets; and acontrol unit configured to display a preset user interface through thedisplay unit on the basis of whether the lens cover is opened or closedand the position of the button part, wherein the control unit isconfigured to determine the position of the button part as a firstposition when the magnetic field of the first polar magnet is sensed bythe case coupling sensing unit, and determines the position of thebutton as a second position when the magnetic field of the second polarmagnet is sensed by the case coupling sensing unit.

In one embodiment, provided is a mobile terminal detachable from aterminal case, comprising: a case body of which a front surface isopened and having a rear incision part defined in a rear surfacethereof; a front cover part rotatably coupled with the case body to openor close the opened front surface of the case body and having a frontincision part; and a lens cover capable of opening or closing the rearincision part; a camera module including a camera lens disposed at aposition corresponding to the rear incision part; a display unitdisplaying an image; a lens cover sensing unit sensing whether the lenscover is opened or closed; a front cover sensing unit sensing whetherthe front cover part is opened or closed; and a control unit configuredto control an execution of a camera application according to whether thelens cover is opened or closed, wherein the control unit is configuredto display a user interface in an area corresponding to the frontincision part of the display unit when the front cover is closed.

In one embodiment, provided is a terminal case detachable from an outerof a mobile terminal having a camera lens, comprising: a case bodyhaving one side opened to be coupled with a mobile terminal; a lenscover mounting part formed at the case body; a rear incision part formedat a position corresponding to the camera lens of the mobile terminal inthe lens cover mounting part; a lens cover coupled to the lens covermounting part to allow the rear incision part to be opened or closed;and a lens cover magnet coupled to the lens cover.

In one embodiment, provided is a mobile terminal assembly, comprising: aterminal case; and a mobile terminal detachable from the terminal case,wherein the terminal case comprises a front cover part having a frontincision part, wherein the mobile terminal comprises: a display unitcovered by the front cover part; a first application including: a firstuser interface provided through the front incision part when the frontcover part is closed; and a second user interface provided through anentire area of the display unit when the front cover part is opened; anda control unit configured to display the first user interface of thefirst application through the front incision part when the front coverpart is closed, and configured to display the second user interface ofthe first application through the entire area of the display unit whenthe front cover part is opened.

The details of one or more embodiments are set forth in the accompanyingdrawings and the description below. Other features will be apparent fromthe description and drawings, and from the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram of a mobile device according to an embodimentof the present invention.

FIG. 2 is a perspective view illustrating a mobile terminal caseaccording to an embodiment of the present invention.

FIG. 3 is a perspective view when a mobile terminal is coupled with aterminal case according to an embodiment of the present invention.

FIG. 4 is a perspective view when a terminal coupling part is seen fromthe front.

FIG. 5 is a perspective view when a terminal coupling part is seen fromthe front.

FIG. 6 is a sectional view taken along a line B-B of FIG. 4.

FIG. 7 is a perspective view of a lens cover.

FIG. 8 is a side view of a lens cover.

FIGS. 9 and 10 are views taken along a line A-A of FIG. 3. FIG. 9 is aview when a lens cover is closed and FIG. 10 is a view when a lens coveris opened.

FIG. 11 is a flowchart illustrating an operating method of a mobileterminal according to an embodiment of the present invention.

FIG. 12 is a view illustrating an image displayed on a display unit whena lens cover is opened in a display unit on and exceptional state.

FIG. 13 is a view illustrating an image displayed on a display unit whena lens cover is opened in a display unit on and exceptional state.

FIG. 14 is a view illustrating an image displayed on a display unit whena lens cover is opened in a display unit off and screen lock settingstate.

FIG. 15 is a view illustrating an image displayed on a display unit whena lens cover is opened in a display unit off and screen lock unsettingstate.

FIG. 16 is a view illustrating an image displayed on a display unit whenan opened lens cover is closed in a display unit on and normal state.

FIG. 17 is a view illustrating an image displayed on a display unit whenan opened lens cover is closed in a display unit off state.

FIG. 18 is a view illustrating an image displayed on a display unit whena lens cover is opened and a screen lock state is released in a displayunit on and exceptional state and then a capture mode is entered and thelens cover is closed again.

FIG. 19 is a view illustrating an image displayed on a display unit whena lens cover is opened and a screen lock state is released in a displayunit on and normal state and then a capture mode is entered and the lenscover is closed again.

FIG. 20 is a view illustrating an image displayed on a display unit whena lens cover is opened and a capture mode is entered in a display unitoff state and then the lens cover is closed again.

FIG. 21 is a view illustrating an image displayed on a display unit whena camera application is executed but a lens cover is closed.

FIG. 22 is a view illustrating a mobile terminal according to anotherembodiment of the present invention.

FIG. 23 is a perspective view when a terminal case includes a couplingdetection magnet and a mobile terminal includes a case coupling sensingunit for sensing the approach of the coupling detection magnet.

FIG. 24 is a flowchart illustrating a control method of displaying lowbattery when a lens cover is opened.

FIG. 25 is a flowchart illustrating a control method of executing ablock box mode when a lens cover is opened.

FIG. 26 is an exploded perspective view illustrating a terminal coverand a mobile terminal according to a second embodiment of the presentinvention.

FIG. 27 is a perspective view of a button part.

FIGS. 28A and 28B are views illustrating a relationship between a buttonpart and a case coupling sensing unit. FIG. 28A is a view when a casecoupling sensing unit detects the N pole of a button part and FIG. 28Bis a view when a case coupling sensing unit detects the S pole of abutton part.

FIG. 29 is a flowchart illustrating a method of setting a flash mode ofa camera application when a lens cover is opened.

FIG. 30 is a flowchart illustrating a method of executing at least onemode among a normal capture mode and an augmented reality mode when alens cover is opened.

FIG. 31 is a flowchart illustrating a method of executing at least onemode among a normal capture mode and a capturing region marking modewhen a lens cover is opened.

FIG. 32 is a flowchart illustrating a method of executing at least onemode among a normal capture mode and a camera lock mode when a lenscover is opened.

FIG. 33 is a flowchart illustrating a method of executing at least onemode among a normal capture mode and a capture mode for reflecting apreset photo effect when a lens cover is opened.

FIG. 34 is a view illustrating a terminal case according to a thirdembodiment of the present invention.

FIG. 35 is a perspective view when a mobile terminal is coupled with aterminal case of FIG. 34.

FIG. 36 is a sectional view taken along a line C-C of FIG. 35.

FIG. 37 is a view illustrating a first display area and a second displayarea of a mobile terminal.

FIG. 38 is a view illustrating the changeable position and size of afirst display area.

FIG. 39 is a view when a control unit selectively turns on/off a lightsource of a backlight unit of a display unit according to a userinterface mode of a mobile terminal.

FIG. 40 is a flowchart illustrating a control method of a mobileterminal.

FIG. 41 is a view when a camera application is displayed on a displayunit of a mobile terminal.

FIG. 42 is a view illustrating a lock screen in a first user interfacemode and a second user interface mode.

FIG. 43 is a view illustrating another example of a user interface.

FIG. 44 is a flowchart illustrating operations of a mobile terminal whenan event that needs to be notified to a user occurs with a closed frontcover part of a mobile terminal case in the mobile terminal.

FIG. 45 is a view illustrating an operation of a call application in auser interface.

FIG. 46 is a view illustrating a user interface displayed when a userlong-presses a power button as a front cover part of a mobile terminalcase in a mobile terminal is closed.

FIG. 47 is a view illustrating a user interface displayed when a userprovides a volume button input as a front cover part of a mobileterminal case is closed.

FIG. 48 is a view illustrating a terminal case according to anotherembodiment of the present invention.

FIG. 49 is a view illustrating a terminal case according to anotherembodiment of the present invention.

FIG. 50 is a perspective view when a stylus pen and a mobile terminalare coupled with a mobile terminal case of FIG. 49.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Hereinafter, a mobile terminal relating to the present invention isdescribed in more detail with reference to the drawings. The suffixes“module” and “unit” for components used in the description below areassigned or mixed in consideration of easiness in writing thespecification and, do not have distinctive meanings or roles bythemselves. In the following description, detailed descriptions ofwell-known functions or constructions will be omitted since they wouldobscure the invention in unnecessary detail. Additionally, theaccompanying drawings are provided to make embodiments of the presentinvention clear and the technical ideal of the present invention is notlimited to the accompanying drawings. It should be understood that theidea and technical scope of the present invention includes allmodifications, equivalents and substitutes.

Although terms like first and second may be used to describe variouscomponents, the components are not limited to the terms. These terms areused only to distinguish one component from other components.

In this disclosure below, when one part (or element, device, etc.) isreferred to as being ‘connected’ to another part (or element, device,etc.), it should be understood that the former can be ‘directlyconnected’ to the latter, or ‘electrically connected’ to the latter viaan intervening part (or element, device, etc.). It will be furtherunderstood that when one component is referred to as being ‘directlyconnected’ or ‘directly linked’ to another component, it means that nointervening component is present.

The terms of a singular form may include plural forms unless they have aclearly different meaning in the context.

The meaning of “include,” “comprise,” “including,” or “comprising,”specifies a property, a region, a fixed number, a step, a process, anelement and/or a component but does not exclude other properties,regions, fixed numbers, steps, processes, elements and/or components.

A mobile terminal described in this specification may include a mobilephone, a smart phone, a laptop computer, a digital broadcastingterminal, a person digital assistant (PDA), a portable multimedia player(PMP), and a navigation. However, it is apparent to those skilled in theart that a configuration listed in an embodiment of the presentinvention is applied to a stationary terminal such as a digital TV and adesktop computer except when only applicable to a mobile terminal.

FIG. 1 is a block diagram of a mobile device according to an embodimentof the present invention.

A mobile terminal in the embodiments described below may include some orall of components described with reference to FIG. 1.

The mobile terminal 100 includes a wireless communication unit 110, anAudio/Video (A/V) input unit 120, a user input unit 130, a sensing unit140, an output unit 150, a memory 160, an interface unit 170, a controlunit 180, and a power supply unit 190. Since the components shown inFIG. 1 are not essential, the mobile terminal device 100 including moreor less components may be realized.

Below, the components are described one by one.

The wireless communication unit 110 may include at least one moduleallowing wireless communication between the mobile terminal 100 and awireless communication system or between the mobile terminal 100 and anetwork including the mobile terminal 100. For example, the wirelesscommunication unit 110 may include a broadcast receiving module 111, amobile communication module 112, a wireless internet module 113, ashort-range communication module 114, and a position information module115.

The broadcast receiving module 111 receives a broadcast signal and/orbroadcast related information from an external broadcast managementserver through a broadcast channel.

The broadcast channel may include a satellite channel and a terrestrialchannel. The broadcast management server may mean a server generatingand transmitting a broadcast signal and/or broadcast related informationor a server receiving and transmitting a pre-generated broadcast signaland/or broadcast related information. The broadcast signal may include aTV broadcast signal, a radio broadcast signal, and a data broadcastsignal, and also may include a broadcast signal combining a TV broadcastsignal or a radio broadcast signal with a data broadcast signal.

The broadcast related information may mean information relating to abroadcast channel, a broadcast program, or a broadcast service provider.The broadcast related information may be provided through a mobilecommunication network. In this case, the broadcast related informationmay be received by the mobile communication module 112.

The broadcast related information may exist in various forms. Forexample, the broadcast related information may exist in forms such asElectronic Program Guide (EPG) of Digital Multimedia Broadcasting (DMB)or Electronic Service Guide (ESG) of Digital Video Broadcast-Handheld(DVB-H).

The broadcast receiving module 111 may receive a digital broadcastsignal by using a digital broadcast system such as Digital MultimediaBroadcasting-Terrestrial (DMB-T), Digital MultimediaBroadcasting-Satellite (DMB-S), Media Forward Link Only (MediaFLO),Digital Video Broadcast-Handheld (DVB-H), or Integrated Services DigitalBroadcast-Terrestrial (ISDB-T). Of course, the broadcast receivingmodule 111 may be configured to be proper for another broadcast systemin addition to the digital broadcast system.

The broadcast signal and/or broadcast related information receivedthrough the broadcast receiving module 111 may be stored in the memory160.

The mobile communication module 112 transmits/receives a wireless signalto/from at least one of a base station, an external terminal, and aserver on a mobile communication network. The wireless signal mayinclude various forms of data according to a voice call signal, a videocall signal, or text/multimedia message transmission.

The wireless internet module 113 is a module for wireless internetaccess, and may be internally or externally included in the mobiledevice 100. As wireless internet technology, there are Wireless LAN(WLAN) (Wi-Fi), Wireless broadband (Wibro), World Interoperability forMicrowave Access (Wimax), and High Speed Downlink Packet Access (HSDPA).

The short-range communication module 114 refers to a module forshort-range communication. As short range communication technology,there are Bluetooth, Radio Frequency Identification (RFID), infraredData Association (IrDA), Ultra Wideband (UWB), and ZigBee.

The position information module 115 is a module for obtaining theposition of a mobile terminal, and its representative example includes aGlobal Position System (GPS) module.

The A/V input unit 120 is to input an audio signal or a video signal,and may include a camera module 121 and a microphone 122. The cameramodule 121 processes a video frame such as a still image or a movingimage obtained by an image sensor in a video call mode or a capturemode. The processed video frame may be displayed on a display unit 151.

The video frame processed by the camera module 121 may be stored in thememory 160 or may be transmitted to the outside through the wirelesscommunication unit 110. The camera module 121 may be provided twoaccording to a usage environment.

The microphone 122 receives an external sound signal through amicrophone in a call mode, a recoding mode, or a voice recognition modeand processes it as voice data. In the case of a call mode, theprocessed voice data may be converted into a format that can be sent toa mobile communication base station and then outputted through themobile communication module 112. The microphone 122 may have variousnoise reduction algorithms to remove noise occurring while an externalsound signal is inputted.

The user input unit 130 generates input data to allow a user to controlan operation of a terminal. The user input unit 130 may include a keypad, a dome switch, a touch pad (resistive/capacitive), a jog wheel, anda jog switch. Additionally, the user input unit 130 may include a touchinput unit 131 equipped at the front of the display unit 151.

The sensing unit 140 detects a current state of the mobile terminal 100,for example, a position of the mobile terminal 100, user contact, anorientation of the mobile terminal 100, and an acceleration/decelerationof the mobile terminal 100, and then generates a sensing signal tocontrol an operation of the mobile terminal 100.

The sensing unit 140 may include a lens cover sensing unit 141 forsensing the open/closed state of the lens cover 240 and also may includea case coupling sensing unit 142 for sensing whether the mobile terminal100 is coupled with the terminal case 200. Additionally, the sensingunit 140 may include a front cover sensing unit 143 for sensing whetherthe front cover part 210 covers the front of the mobile terminal 100.

Moreover, the sensing unit 140 may include a proximity sensor. Anexample of the proximity sensor includes a hall sensor. For example, thelens cover sensing unit 141 may be a proximity sensor sensing whetherthe lens cover 240 is opened or closed by sensing the approach of thelens cover magnet 245 equipped at the lens cover 240. Moreover, the casecoupling sensing unit 142 may be a proximity sensor sensing whether themobile terminal 100 is coupled with the case 200 by sensing the approachof the lens cover magnet 245 equipped at the lens cover 100.Additionally, the front cover sensing unit 143 may also include aproximity sensor and for example, may sense the approach of the magnet222 equipped at the front cover part 210 as shown in FIG. 34.

Furthermore, the proximity sensor may include optical proximity sensors,capacitive proximity sensors, optical proximity sensor, eddy currentproximity sensor, ultrasonic proximity sensors, inductive proximitysensors in addition to a magnetic proximity sensor such as a hallsensor.

Additionally, the sensing unit 140 may sense the on/off state of thedisplay unit 151, the power supply of the power supply unit 190, andexternal device connection of the interface unit 170.

The output unit 150 generates a visual, auditory, and tactile relatedoutput and may include a display unit 151, a sound output module 152, analarming unit 153, and a haptic module 154.

The display unit 151 displays (outputs) information processed in themobile terminal 100. For example, when a mobile terminal is in a callmode, a call related User Interface (UI) or Graphic User Interface (GUI)is displayed. When the mobile terminal 100 is in a video call mode, or acapture mode, a captured or/and received image, UI, or GUI is displayed.

The display unit 151 may include at least one of a liquid crystaldisplay (LCD), a thin film transistor-liquid crystal display (a TFTLCD), an organic light-emitting diode (OLED), a flexible display, and a3D display.

Among them, some displays may be a transparent or light transmissivetype so that it is possible to see the outside through them. This may becalled a transparent display, and its representative example includes aTransparent OLED (TOLED). The display unit 151 may have a rear structureor a light transmissive type structure. Due to such a structure, a usermay see an object at the rear of the terminal body through an area thatthe display unit 151 of the terminal body occupies.

According to an implementation form of the mobile terminal 100, at leasttwo display units 151 may exist. For example, a plurality of displayunits are separately or integrally disposed at one side or differentsides, respectively, in the mobile terminal 100.

When the display unit 151 and a sensor sensing a touch operation(hereinafter, referred to as a ‘touch sensor’) constitute a mutual layerstructure (hereinafter, referred to as a ‘touch screen’), the displayunit 151 may be used as an input device addition to an output device.The touch sensor may have a form such as a touch film, a touch sheet, ora touch pad.

The touch sensor is configured to covert a pressure applied to aspecific portion of the display unit 151, or a change in capacitanceoccurring at a specific portion of the display unit 151 into anelectrical input signal. The touch sensor may be configured to sense apressure at the time of touch in addition to a touched position andarea.

When there is touch input on the touch sensor, signal(s) correspondingthereto may be sent to a touch control unit. The touch control unitprocesses the signal(s) and transmits corresponding data to the controlunit 180. By doing so, the control unit 180 recognizes which area of thedisplay unit 151 is touched.

The sound output module 152 may output audio data received from thewireless communication unit 110 or stored in the memory 160, in a callsignal receiving mode, a call mode, a recording mode, a recording mode,a voice recognition mode, or a broadcast receiving mode. The soundoutput module 152 may output a sound signal relating to a function ofthe mobile terminal 100 (for example, call signal receiving sound, andmessage receiving sound). The sound output module 152 may include areceiver, a speaker, and a buzzer.

The alarming unit 153 outputs a signal for notifying an event occurrenceof the mobile terminal 153. An example of an event occurring in a mobileterminal may include call signal reception, message reception, keysignal input, and touch input. The alarming unit 153 may output a signalfor notifying event occurrence with vibration, besides a video signal oran audio signal. The video signal or audio signal may be outputtedthrough the display unit 151 or the sound output module 152, so thatthey 151 and 152 may be classified as part of the alarming unit 153.

The haptic module 154 may generate various tactile effects that a usercan feel. A typical example of a haptic effect that the haptic module154 generates includes vibration. The intensity and pattern of avibration generated by the haptic module 154 is controllable. Forexample, different vibrations may be synthesized and outputted or may besequentially outputted.

The haptic module 154 may generate various haptic effects, for example,a pin arrangement that vertically moves with respect to a contact skinsurface, an injection power or suction power of air through a nozzle oran inlet, a graze on a skin surface, a contact of an electrode, aneffect by stimuli such as electrostatic force, and an effect bycold/warm reproduction using a heat absorbing or generating device.

The haptic module 154 may deliver haptic effects through direct contact,and a user may feel haptic effects through a muscle sense of fingers orhands. The haptic module 154 may be provided two according to aconfiguration aspect.

The memory 160 may store a program for an operation of the control unit180, and may temporarily store input/output data (for example, aphonebook, a message, a still image, and a moving image). The memory 160may store data relating to various patterns of vibrations and sounds,which are outputted during touch input on the touch screen.

The memory 160 may include at least one type of storage medium among aflash memory type, a hard disk type, a multimedia card micro type, cardtype memory (for example, SD or XD memory), Random Access Memory (RAM),Static Random Access Memory (SRAM), Read-Only Memory (ROM), ElectricallyErasable Programmable Read-Only Memory (EEPROM), Programmable Read-OnlyMemory (PROM), magnetic memory, magnetic disk, and optical disk. Themobile terminal 100 may operate in relation to a web storage performingthe storage function of the memory 160 on internet.

The interface unit 170 serves as a path through which all externaldevices are connected to the mobile terminal 100. The interface unit 170receives data from an external device or power, and then delivers it toeach component in the mobile terminal 100 or transmits data in themobile terminal 100 to an external device after power is received. Forexample, the interface unit 170 includes a wired/wireless headset port,an external charging port, a wired/wireless data port, a memory cardport, a port connecting a device equipped with an identification module,an audio input/output (I/O) port, a video input/output (I/O) port, andan earphone port.

The identification module is a chip storing various information toauthenticate the permission of the mobile terminal 100, and may includea User Identify Module (UIM), a Subscriber Identity Module (SIM), and aUniversal Subscriber Identity Module (USIM). A device equipped with anidentification module (hereinafter, referred to as an “identificationdevice’) may be manufactured with a smart card type. Accordingly, theidentification device may be connected to the mobile terminal 100through a port.

When the mobile terminal 100 is connected to an external cradle, theinterface unit 170 may be a path through which power is supplied fromthe cradle to the mobile terminal 100, or various command signalsinputted from the cradle are delivered to the mobile terminal 100.Various command signals or power inputted from the cradle may operate asa signal for recognizing that the mobile terminal 100 is accuratelymounted on the cradle.

The control unit 180 controls overall operations of a mobile terminal ingeneral. For example, control and processing relating to a voice call, adata call, a video call are performed. The control unit 180 may includea multimedia module 181 for multimedia playback. The multimedia module181 may be implemented in the control unit 180 or may be separated fromthe control unit 180.

Additionally, the control unit 180 may perform pattern recognitionprocessing to recognize writing input and drawing input on the touchscreen as text and images, respectively.

The power supply unit 190 supplies power necessary for operations ofeach component by receiving external power and internal power inresponse to a control of the control unit 180.

Various embodiments described herein may be realized in a computer ordevice similar thereto readable recording medium by using software,hardware, or a combination thereof. In terms of hardware realization,the embodiments described herein may be realized by using at least oneof application specific integrated circuits (ASICs), digital signalprocessors (DSPs), digital signal processing devices (DSPDs),programmable logic devices (PLDs), field programmable gate arrays(FPGAs), processors, controllers, micro-controllers, microprocessors,and electrical units for performing other functions. In some cases,embodiments described in this specification may be realized by thecontrol unit 180 itself.

In terms of software realization, embodiments such as procedures andfunctions described in this specification may be realized usingadditional software modules. Each of the software modules may perform atleast one function and operation described in this specification.Software code may be realized by software application written in aproper program language. The software code is stored in the memory 160and is executed by the control unit 180.

First Embodiment

A mobile terminal assembly according to the first embodiment of thepresent invention includes a mobile terminal 100 and a separate terminalcase 200 detachable from the mobile terminal 100.

Hereinafter, a structure of a terminal case according to a firstembodiment of the present invention will be described with reference toFIGS. 2 to 8.

FIG. 2 is a perspective view when a mobile terminal 100 is coupled witha terminal case 200 according to an embodiment of the present invention.

Referring to FIG. 2, the terminal case 200 includes a terminal couplingpart 210, a front cover part 220 foldably coupled to the terminalcoupling part 100, and a connection part 290 connecting the terminalcoupling part 100 and the front cover part 220.

The terminal coupling part 210 covers a portion of a side and a bottomof the mobile terminal 100 and is formed to be detachable from themobile terminal 100.

Additionally, the front cover part 220 has a pin form corresponding to afront form of the mobile terminal 100 substantially and a portion of thefront cover part 220 may include a transparent front incision part 221.The front incision part 221 may be formed when a portion of the frontcover part 220 is penetrated and may be a portion formed of atransparent member for allowing a touch input of a user.

Hereinafter, a configuration and functions of the terminal coupling part210 are described in more detail.

FIG. 3 is a perspective view illustrating a mobile terminal coupled withthe terminal coupling part 210 as seen diagonally from the rear. FIGS. 4and 5 are perspective view illustrating the terminal coupling part 210as seen diagonally from the front. Especially, FIG. 4 illustrates a viewwhen the lens cover 240 is closed and FIG. 5 illustrates a view when thelens cover 240 is opened.

The terminal coupling part 210 has a form in which a central partextends flat substantially and bends toward the front around the leftand right end parts and protrudes. Additionally, the front has an openform to allow the mobile terminal 100 to be detachable. Accordingly, aspace for receiving the mobile terminal 100 is formed in the terminalcoupling part 210 and when the mobile terminal 100 is coupled, covers aside and a bottom of the mobile terminal 100. Moreover, the distancebetween the left and right end parts at the frontline of the terminalcoupling part 210 is formed to be narrower than the horizontal width ofthe mobile terminal 100. Accordingly, when the mobile terminal 100 iscoupled, the left and right end parts are elastically deformed andopened. After the mobile terminal is coupled, the left and right endparts of the mobile terminal 100 are pressed inwardly by elasticrestoring force. Therefore, a coupling state between the mobile terminal100 and the terminal coupling part 210 may be maintained.

Here, the terminal coupling part 210 may be additionally coupled with arear case of the mobile terminal 100 or the rear of a battery cover.

However, unlike this, the terminal coupling part 210 may replace therear case or the battery cover of the mobile terminal 100. In this case,the terminal coupling part 210 may cover the rear of electroniccomponents configuring the mobile terminal 100.

Moreover, the terminal coupling part 210 includes a lens cover mountingpart 230. The lens cover mounting part 230 is disposed at apredetermined position of the terminal coupling part 210 and the lenscover 240 is slidably coupled to the lens cover mounting part 230.Hereafter, a configuration of the lens cover 240 is described withreference to FIGS. 6 to 8 and then a configuration of the lens covermounting part 230 is described with reference to FIGS. 3 to 5.

FIG. 6 is a sectional view taken along a line B-B of FIG. 4. FIG. 7 is aperspective view of the lens cover 240. FIG. 8 is a side view of thelens cover 240.

Referring to FIGS. 6 to 8, the lens cover 240 includes an inner part 241disposed inside the terminal coupling unit 210 and an outer part 243disposed outside the case body 220. Additionally, the lens cover 240further includes a middle part 242 disposed between the outer part 243and the inner part 241. The inner part 241 and the outer part 243 mayall have a plate shape.

The outer part 243 may extend shorter than the inner part 241 along asliding direction. Additionally, the middle part 242 may extend shorterthan the inner part 241.

Here, a direction in which the lens cover 240 slides is referred to as afirst direction (an x-axis direction) and a direction perpendicular tothe first direction is referred to as a second direction (a y-axisdirection). Accordingly, the first direction and the second directionall are directions parallel to an extension direction of a flat plateforming the inner part 241 or the outer part 243. Moreover, a directionperpendicular to all the first direction and the second direction isreferred to as a third direction (a z-axis direction). The thirddirection (the z-axis direction) is a direction perpendicular to a flatplate forming the inner part 241 or the outer part 243. Hereinafter, indescribing an embodiment of the present invention, a forward-backwarddirection means the third direction.

Accordingly, in relation to the length of the first direction (thex-axis direction) of the lens cover 240, the inner part 241 is thelongest, the outer part 243 is the second longest, and the middle part242 is the shortest.

Moreover, in relation to the length of the second direction (the y-axisdirection) of the lens cover 240, the inner part 241 and the outer part243 are almost same and the middle part 242 is the shortest. That is,the second direction length of the middle part 242 has a form extendingrelatively shorter than the inner part 241 and the outer part 243.Accordingly, the lens cover 240 has a form in which the middle part 242between the inner part 241 and the outer part 243 is concavely andinwardly recessed along the second direction. Then, this concave grooveforms a guide groove 244.

Moreover, an elastic protrusion 246 protruding in the second directionis coupled with the inner part 241. The elastic protrusion 246 iselastically deformable. Accordingly, if there is no external force, theelastic protrusion 246 protrudes toward the outside but if an externalforce is applied in the second direction, retreats toward the inside.

Moreover, the lens cover magnet 245 is coupled with the lens cover 240.The lens cover magnet 245 is coupled with the first direction end partof the inner part 241. The approach of the lens cover magnet 245 issensed by the lens cover sensing unit 141 (described below) built in themobile terminal 100 and this may serve to allow the control unit 180 torecognize an open/closed state of the lens cover 240. For reference, thelens cover sensing unit 141 may be a hall sensor for sensing magneticfield of the lens cover magnet 245.

Moreover, the outer edge of the outer part 243 is formed to be inclined.In more detail, the outer part 243 has a form in which the outers of theboth end parts in the first sliding direction are inclined. With such astructure, when the camera module 121 operates, it prevents the angle ofview from being narrowed due to the outer part 243. That is, the maximumangle of view may be secured.

Hereinafter, a configuration of a mounting part of the lens cover 230with which the lens cover 240 having the above configuration is slidablycoupled is described.

Referring to FIGS. 4 and 5, the lens cover mounting part 230 is formedwhen the inner side of the terminal coupling part 210 is steppedly andoutwardly recessed. That is, the inner side is recessed outwardly alongthe third direction (the z-axis direction). At this point, the recesseddepth of the lens cover mounting part 230 may be roughly identical tothe third direction thickness of the inner part 241 of the lens cover240 or deeper than the inner part 241.

A rear incision part 231 extending in the first direction is formed atthe lens cover mounting part 230. The rear incision part 231 penetratesthe terminal coupling part 210 in the third direction and extends in thefirst direction with a predetermined width in the second direction.

Moreover, the guide protrusion 231 of FIG. 3 inserted into the guidegroove 224 of the lens cover 240 is disposed at the lens cover mountingpart 230. The guide protrusion 232, as a portion inserted into the guidegroove 244 of the lens cover 240, is an edge portion of the rearincision part 241 extending in the first direction. The third directionwidth of the guide protrusion 232 may be identical to another portion ofthe terminal coupling part 210. However, the third direction width ofthe guide protrusion 232 may be thicker or thinner another portion.

Moreover, protrusion insertion parts 233 a and 233 b to which theelastic protrusion 246 is insertable are disposed at the lens covermounting part 230. The protrusion insertion parts 233 a and 233 b may beformed at the stepped surface 234 of the mounting part of the lens cover240. Here, the stepped surface 234, as a stepped portion between therecessed lens cover mounting part 230 and its outer portion, is asurface facing the second direction (the y-axis direction) roughly.Also, the protrusion insertion parts 233 a and 233 b has a form in whicha portion of the stepped surface 234 is concavely recessed in the seconddirection.

The protrusion insertion parts 233 a and 233 b are formed in pluralityalong the first direction. For example, the protrusion insertion parts233 a and 233 b include a first protrusion insertion part 233 a to whichthe elastic protrusion 246 is inserted when the lens cover 240 is closedand a second protrusion insertion part 233 b to which the elasticprotrusion 246 is inserted when the lens cover 240 is opened.Accordingly, when the lens cover 240 is opened, the elastic protrusion246, which is inserted into the first protrusion insertion part 233 awhen the lens cover 240 is closed, may exit from the first protrusioninsertion part 233 a, slide along the first direction, and be insertedinto the second protrusion insertion part 233 b.

Moreover, while the lens cover 240 slides, as shown in FIG. 6, thesliding of the lens cover 240 is guided by the guide protrusion 232inserted into the inside of the guide groove 244.

Hereinafter, referring to FIGS. 9 and 10, the configuration of themobile terminal 100 is described additionally and then a physicaloperating method of the lens cover 240 is described.

FIGS. 9 and 10 are sectional views taken along a line A-A of FIG. 3 andillustrate the mobile terminal 100 coupled with the terminal case 200.FIG. 9 illustrates a view when the lens cover 240 is closed and FIG. 10illustrates a view when the lens cover 240 is opened.

A display unit 151 is disposed in the mobile terminal 100 so as todisplay an image. Also, a touch input unit 131, as part of the userinput unit 130, is disposed at the front (the top in FIGS. 9 and 10).Also, a printed circuit board 181 coupled with the control unit 180 isdisposed at the rear of the display unit 151.

Additionally, the camera module 121 is disposed at the central portionof the printed circuit board 181 and the lens cover sensing unit 141 forsensing the opened or closed state of the lens cover 240 is disposed ata portion spaced a predetermined distance from the camera module 121 ina horizontal direction, that is, the first direction. The lens coversensing unit 141 may be a hall sensor for sensing whether the lens covermagnet 245 coupled with the lens cover 240 approaches.

In relation to the terminal case 200 and the mobile terminal 100, asshown in FIG. 9, when the lens cover 240 is closed, the lens covermagnet 245 coupled with the lens cover 240 is disposed in the sensingarea of the lens cover sensing unit 141. Since the lens cover sensingunit 141 is a hall sensor, it detects whether the lens cover 240 isopened or closed by detecting magnetic field of the lens cover magnet245. That is, when the lens cover magnet 245 is placed within apredetermined distance from the lens cover sensing unit 241, the lenscover sensing unit 141 senses it and thus recognizes that the lens cover240 is closed.

On the other hand, as shown in FIG. 10, when the lens cover 240 isopened and becomes away from the lens cover sensing unit 141, that is,outside the sensing area of the lens cover sensing unit 141, the lenscover sensing unit 141 senses that the lens cover 240 is opened.

Moreover, when the lens cover 240 slides in the lens cover mounting part230, the guide protrusion 232, as shown in FIG. 6, is maintained beinginserted into the guide groove 244. That is, the sliding of the lenscover 240 may be guided by the guide protrusion 232 and the guide groove244.

Hereinafter, referring to FIG. 11, an operating method of the mobileterminal according to an embodiment of the present invention isdescribed in more detail. In more detail, an operating method of thecontrol unit 180 is described according to whether the lens cover 240 isopened or closed.

FIG. 11 is a flowchart illustrating an operation of a mobile terminalaccording to an embodiment of the present invention.

Before describing each operation shown in FIG. 11, when an overalloperation method is described in brief, as a user slides the lens cover240 and changes the closed state into an opened state, the camera lens121 a is exposed to the outside. At this point, the sensing unit 140senses the opening of the lens cover 240. The control unit 180 executesa camera application when it is determined that the lens cover 240 isopened. At this point, an operation of the camera application may startin one of a capture mode and a camera preview mode. Accordingly, thecontrol unit 180 may display a camera preview mode interface on thedisplay unit 151 by selecting the camera preview mode and may display acapture mode user interface on the display unit 151 by selecting acapture mode. For reference, the capture mode means a mode in whichcapturing is available by a user input and the camera preview mode meansa mode in which capturing by a user input is limited.

Hereinafter, referring to FIG. 11, an operation for executing a cameraapplication in one of a capture mode or a camera preview mode isdescribed in more detail.

First, the control unit 180 receives signals on the open of the lenscover 240 from the sensing unit 240 in operation S201.

When an opened state of the lens cover 240 is received, the control unit180 determines whether the current display unit 151 is on or off inoperation in operation 5202.

When the display unit 151 is on, the control unit 180 determines whetherit is an exceptional state in operation S203. The exceptional state is alock screen state or an in call state and is set as a state in whichfree use of a mobile terminal is limited or a prioritized task isperformed. The concept contrary to the exceptional state is a normalstate. The normal state is set to a state other than the exceptionalstate. Accordingly, in the normal state, a mobile terminal may be usedfreely through a touch operation. Accordingly, when the display unit 151is on, it is in one of the normal state and the exceptional state.

The control unit 180 enters the camera preview mode when a state of thedisplay unit 151 is in the exceptional state in operation S204. That is,by selecting the camera preview mode, the camera application is executedin the camera preview mode. Accordingly, a camera preview mode interfaceis displayed on the display unit 151. The camera preview mode interfaceincludes a capture mode interface 301 and a lock release interface 302.Accordingly, in the camera preview mode, the capture mode interface isoutputted but if a lock state is released by manipulating the lockrelease interface outputted together or a prioritized task such as acall state is not released, a touch input for capture is not received.

In this state, a user may perform a touch input for lock release torelease a screen lock state.

The control unit 180 determines whether the screen lock state isreleased in the camera preview mode in operation S205.

Then, when control unit 180 receives a screen lock release signal as adetermination result from a touch unit, after the lock state isreleased, it enters the capture mode in operation 5206. That is, thecapture mode is selected. At this point, the control unit 180 displaysthe capture mode interface 301 of the camera application on the displayunit 151. Accordingly, a user may capture a desired subject by using thecamera application.

Moreover, in operation S203, after the control unit 180 determineswhether the display unit 151 is in the exceptional state, if the displayunit 151 is in the normal state instead of the exceptional state, thecontrol unit 180 enters the capture mode directly. That is, the controlunit 180 selects the capture mode and displays the capture modeinterface 301 on the display unit 151. Accordingly, a user manipulatesthe capture mode interface 301 to capture an image.

Moreover, after determining that the display unit 151 is off inoperation 5202, the control unit 180 determines whether the display unit151 is in a screen lock setting state in operation S208.

If it is determined that the display unit 151 is in the screen locksetting state, the control unit 180 enters the camera preview mode inoperation 5209. That is, by selecting the camera preview mode, thecamera application is executed in the camera preview mode. Accordingly,the display unit 151 displays the lock release interface 302 in additionto the capture mode interface 301. That is, in the camera preview mode,although the capture mode interface 301 is outputted, if a lock state ora prioritized task state is not released by manipulating the lockrelease interface 302 outputted together, capturing an image is notperformed.

In this state, a user may perform a touch input for lock release torelease a screen lock state.

The control unit 180 determines whether the screen lock state isreleased in the camera preview mode in operation S210. Then, when acontrol unit 180 receives a screen lock release signal as adetermination result from a touch unit, after the lock state isreleased, it enters the capture mode in operation 5211. That is, thecapture mode is selected. In the capture mode, the control unit 180outputs the capture mode interface 301 of the camera application on thedisplay unit 151. Accordingly, a user may capture a desired subject byusing the camera application.

Moreover, in operation S208, if it is determined that the display unit151 is not in the screen lock state, the control unit 180 enters thecapture mode in operation S212. That is, the capture mode is selected.Then, the control unit 180 outputs the capture mode interface 301 of thecamera application on the display unit 151. Accordingly, a user maycapture a desired subject by using the camera application.

FIGS. 12 to 15 are views illustrating a user interface provided in theabove-mentioned process.

First, FIG. 12 is a view illustrating an image displayed on a displayunit when a lens cover is opened in a display unit on and exceptionalstate. In more detail, as operation S204 is performed in the displayunit on and exceptional state, a camera preview mode interface isoutputted on the display unit 151. As described above, as the cameraapplication is executed, the capture mode interface 301 and the lockrelease interface 302 are displayed on the display unit 151. AlthoughFIG. 12 illustrates an exemplary screen for inputting a 4-digit passwordas one example of various scenarios for lock release, other various lockrelease scenarios may be provided.

Moreover, FIG. 13 is a view illustrating an image displayed on a displayunit when a lens cover is opened in a display unit on and exceptionalstate. In more detail, as operation S207 is performed in the displayunit on and normal state, a capture mode interface is provided. In thisstate, a user may perform capturing an image by short-touching orlong-touching a capture icon.

Moreover, FIG. 14 is a view illustrating an image displayed on a displayunit when a lens cover is opened in a display unit off and screen locksetting state. In more detail, while the display unit 151 is off and ascreen lock is set, as operation 5209 is performed with the lens cover240 opened, the control unit 180 displays the display screen of thedisplay unit 151 in the camera preview mode. That is, the screen of thedisplay unit 151 in operation 5209 is shown. In this state, the displayunit 151 executes the camera application so that it outputs the capturemode interface 301 and the lock release interface 302 on the displayunit 151. At this point, as one of various scenarios providing lockrelease, a lock release method for releasing a lock setting by dragginga pattern may be provided.

As shown in a state of FIG. 14, when a user performs a touch input forlock release to release a screen lock state, the screen lock state isreleased and it is possible to enter the capture mode. That is, thecapture mode is selected.

Moreover, FIG. 15 is a view illustrating an image displayed on a displayunit when a lens cover is opened in a display unit off and screen lockunsetting state. In more detail, in the display unit off and screen lockunsetting state, once an open signal for the lens cover 240 is inputtedto the control unit 180, the control unit 180 executes the capture modeof the camera application to display the capture mode interface 301 onthe display unit 151.

Hereinafter, referring to FIGS. 16 to 20, in contrast to those describedso far, an operating method of a mobile terminal when the lens cover 240is manipulated from an off state to an on state is described. In moredetail, referring to FIGS. 16 and 17, while the camera application isnot in execution, if an opened lens cover is closed, changes in a userinterface are described. Referring to FIGS. 18 to 20, while the cameraapplication is in execution, a display unit is shown when the openedlens cover is closed.

FIGS. 16 and 17 are views illustrating a user interface when the displayunit 151 is on but does not enter a capture mode or a camera previewmode. FIGS. 18 and 19 are views illustrating a user interface when acontrol unit enters a capture mode or a camera preview mode.

Hereinafter, examples of FIGS. 16 to 20 are examined in order.

FIG. 16 is a view illustrating an image displayed on a display unit whenan opened lens cover is closed in a display unit on and normal state.Referring to FIG. 16, when the display unit 151 is on and is not in acapture mode or a camera preview mode, even if the camera lens 121 a isclosed, a user interface does not change. That is, when the display unit151 is on and is not in a capture mode or a camera preview mode, even ifa close signal of the camera lens 121 a is received, the control unit180 does not perform an additional task for user interface switching.

As shown in FIG. 17, this is identical to the case that the display unit151 is off. FIG. 17 is a view illustrating an image displayed on adisplay unit when an opened lens cover is closed in a display unit offstate. When the display unit 151 is off and the lens cover 240 isclosed, the display unit 151 maintains an off state continuously. Thatis, when the display unit 151 is off and is not in a capture mode or acamera preview mode, even if the camera lens 121 a is closed, thecontrol unit 180 does not perform an additional task for user interfaceswitching.

Moreover, as shown in FIGS. 18 to 20, while the control unit 180provides a user interface of a capture mode or a camera preview modethrough the display unit 151, if the lens cover 240 changes from an onstate into an off state, the control unit 180 display a screen before acapture mode or camera preview mode interface is displayed through thedisplay unit 151.

FIG. 18 is a view illustrating an image displayed on a display unit whena lens cover is opened and a screen lock state is released in a displayunit on and exceptional state and then a capture mode is entered and thelens cover is closed again. Referring to FIG. 18, when a capture mode isentered through operation 5206 of FIG. 10 described above by releasing ascreen lock in operation S204, as a closed signal of the lens cover 240is received, the control unit 180 terminates a camera preview mode anddisplays an image before switching into the camera preview mode. Thatis, an image guiding a screen lock state is outputted. However, in thecase of swipe, a lock release screen is displayed in addition to a lockreleased screen.

FIG. 19 is a view illustrating an image displayed on a display unit whena lens cover is opened and a screen lock state is released in a displayunit on and normal state and then a capture mode is entered and the lenscover is closed again. Referring to FIG. 18, when a capture mode isentered through operation S207 of FIG. 8 described above, as a closedsignal of the lens cover 240 is received, the control unit 180terminates a capture mode and displays an image before switching intothe capture mode.

FIG. 20 is a view illustrating an image displayed on a display unit whena lens cover is opened and a capture mode is entered in a display unitoff state and then the lens cover is closed again. Referring to FIG. 20,when a camera preview mode or a capture mode is outputted on the displayunit 151 through operation S212 of FIG. 10 described above, as a closedsignal of the lens cover 240 is received, the control unit 180terminates a preview mode or a capture mode and turns off the displayunit 151, thereby returning to an original off state of the display unit151.

Moreover, FIG. 21 is a view illustrating a user interface when the lenscover 240 is maintained in a closed state and capturing is impossiblealthough a camera application is executed through an operation of amobile terminal. In such a case, the control unit 180 may output a guidemessage “lens cover is closed” or “open lens cover” through a displayunit.

In this state, when lens cover 240 is opened by an operation of a user,the control unit 180 may output an image displaying this, for example,an animation representing that the camera's shutter is opened.

Moreover, when the lens cover is opened in operation S207 or S212, thecontrol unit 180, the control unit 180 is set to capture an image sothat fast capturing is possible. At this point, capturing is made whenthe lens cover is opened or after a time delay of a predetermined time.For example, first capturing may be set to be performed after 1 sec whenthe lens cover is opened.

Moreover, the lens cover 240 according to an embodiment of the presentinvention may be configured to horizontally slide along the firstdirection as described with reference to FIGS. 3 to 21 or may beconfigured to vertically slide along the second direction as shown inFIG. 22. Even if the lens cover 240 is opened or closed vertically, anoperation of a mobile terminal according to the opened or closed stateof the lens cover 240 should be understood as being identical to anoperation when the lens cover 240 moves horizontally.

Moreover, as shown in FIG. 23, the terminal case 200 includes a couplingdetection magnet 250 and the mobile terminal 100 includes a casecoupling sensing unit 142 for sensing whether the terminal case 200 iscoupled by sensing the approach of the coupling detection magnet 250.

That is, the mobile terminal 100, as described with reference to theblock diagram of FIG. 1, may include the lens cover sensing unit 141 andthe case coupling sensing unit 142. The terminal coupling unit 210 ofthe terminal case 200 includes the lens cover magnet 245 and thecoupling detection magnet 250.

Accordingly, the lens coupling sensing unit 142 in the sensing unit 140may sense whether the mobile terminal 100 is coupled with the terminalcase 200 and the control unit 180 may provide various user interfaces orvarious applications on the basis of the sensing information.

Hereinafter, referring to FIGS. 24 and 25, an operating method of themobile terminal 100 equipped with the coupling detection magnet 250 isdescribed in more detail.

First, when a battery remaining is less than a reference value and thelens cover 240 is opened, low battery information is displayed. Thiscase is described with reference to FIG. 24. FIG. 24 is a flowchart forillustrating such an example.

Referring to FIG. 24, the control unit 180 determines whether the mobileterminal 100 is coupled with the case 200 on the basis of the detectioninformation of the case coupling sensing unit 142 in operation 5311.

Additionally, on the basis of the detection information of the lenscover sensing unit 141, it is determined whether the lens cover 240 isopened in operation S312.

Additionally, on the basis of a signal from the power supply unit 190,it is determined whether a battery remaining is less than a referencevalue in operation 5313.

When a mobile terminal is coupled with a case and a lens cover isopened, if it is determined that a battery remaining is less than areference value, the control unit 180 displays a message that thebattery remaining is low through the display unit 151 in operation 5314.

At this point, the message that the battery remaining is low is asentence or a sound signal meaning that the battery remaining isinsufficient. Additionally, a battery display may be enlarged anddisplayed through a display unit. A method of displaying a low batterymay be various besides the above method.

Moreover, in the case that a terminal case is mounted at a vehicle, asshown in FIG. 25, the mobile terminal 100 is mounted at the case 200 anda black box mode is automatically executed if the lens cover 240 isopened. FIG. 25 is a flowchart for illustrating an example of a blockbox mode in execution.

Referring to FIG. 25, the control unit 180 determines whether the mobileterminal 100 is coupled with the case 200 attached to a vehicle on thebasis of the sensing information of the case coupling sensing unit 142in operation 5321.

Then, on the basis of the sensing information of the lens cover sensingunit 141, it is determined whether the lens cover 240 is opened inoperation S322.

When it is determined that the mobile terminal 100 is coupled with thecase attached to the vehicle and the lens cover 240 is opened, thecontrol unit 180 executes the black box mode in operation 5323. Here,executing the black box mode may be executing a black box application ora video recording function of a camera application.

Moreover, although the terminal case 200 includes the terminal couplingpart 210, the front cover part 220, and the connection part 290according to this embodiment of the present invention, the terminal case200 may only include the terminal coupling 210 without the front coverpart 220 and the connection part 290.

Second Embodiment

Moreover, a mobile terminal assembly according to the second embodimentof the present invention includes a mobile terminal 100 and a terminalcase 200 detachable from the mobile terminal 100.

FIG. 26 is an exploded perspective view illustrating the terminal case200 and the mobile terminal 100 detachable from the terminal case 200according to the second embodiment of the present invention. FIG. 27 isa side view of a button part 260. FIG. 28 is a view illustrating anoperating state of the button part 260.

Although only the terminal coupling part 210 of the terminal case 200 isshown in FIG. 26, the terminal case 200 may include the front cover part220 and the connection part 230 like the first embodiment. Additionally,the terminal case 200 includes only the terminal coupling part 210without the front cover part 220 and the connection part 230.

Hereinafter, referring to FIGS. 26 to 33, the coupling detection magnet250 equipped at the terminal case 200 includes a plurality of magneticbodies having different polarities and the case coupling sensing unit142 built in the mobile terminal 200 senses the polarity of a magnet. Acontrol unit executes a preset application or display a user interfaceon the basis of the sensing value.

First, referring to FIG. 26, the terminal case 200 further includescoupling detection magnetic bodies 265N and 265S for sensing thecoupling of the mobile terminal 100 and the terminal case 200 inaddition to the lens cover magnet 245 for sensing the opened or closedstate of the lens cover 240. The coupling detection magnetic bodies 265Nand 265S are disposed at the button part 260. The terminal case 200described with reference to FIG. 26 has the same configuration as thatin the first embodiment except for the button part 260 added. Therefore,overlapping description other than the button part 260 is omitted.

Hereinafter, referring to FIG. 27, a configuration of the button part260 is described in more detail. FIG. 27 is a side view of the buttonpart 260.

Referring to FIGS. 27 to 8, the button part 260 includes an inner part261 disposed inside the terminal coupling unit 210 and an outer part 263disposed outside the case body 220. Additionally, the button part 260further includes a middle part 262 disposed between the outer part 263and the inner part 26. The inner part 261 and the outer part 263 may allhave a plate shape.

The outer part 263 may extend shorter than the inner part 261 along thefirst direction, that is, a sliding direction. Additionally, the middlepart 262 may extend shorter than the inner part 241. The outer part 263and the middle part 262 are disposed at the first direction center ofthe inner part 261 extending long.

Moreover, the second direction length of the lens cover 240 is identicalto that in the first embodiment of FIG. 6. That is, the inner part 261and the outer part 263 have the same second direction length and themiddle part 262 is the shorter than those. That is, the second directionlength of the middle part 262 is relatively shorter than that of theinner part 261 and the outer part 263. Accordingly, the lens cover 240has a form in which the middle part 262 between the inner part 261 andthe outer part 263 is concavely and inwardly recessed along the seconddirection as seen from the first direction, that is, the slidingdirection.

Moreover, an elastic protrusion 246 protruding in the second directionis coupled with the inner part 261. The elastic protrusion 246 iselastically deformable. Accordingly, if there is no external force, theelastic protrusion 246 protrudes toward the outside but if an externalforce is applied in the second direction, retreats toward the inside.

Moreover, the coupling detection magnetic bodies 265N and 265S arecoupled with the lens cover 240. The coupling detection magnetic bodies265N and 265S may include a plurality of magnetic bodies havingdifferent polarities. For example, the coupling detection magneticbodies 265N and 265S may include a first polar magnet 265N having afirst polarity and a second polar magnet 265S having a second polarity.The first polarity may be the N pole and the second polarity may be theS pole.

The magnet 250 is coupled with the vicinity of both end parts of theinner part 261. That is, the first polar magnet 265N is coupled with oneend of the inner part 261 and the second polar magnet 265S is coupledwith the other end of the inner part 261.

The approach of the coupling detection magnetic bodies 265N and 265S issensed by the case coupling sensing unit 142 built in the mobileterminal 100 and this may serve to allow the control unit 180 torecognize the opened or closed state of the lens cover 240.

Moreover, the button part 260 may be coupled with the case body 210 ofthe terminal case 200. For this, a structure similar to that of theabove-mentioned lens cover mounting part 230 is prepared at the mountingposition of the button part 260. Accordingly, the button part mountingpart where the button part 260 is mounted is not described.

Additionally, as mentioned above, the terminal case 200 described withreference to FIG. 26 has the same configuration as that in the firstembodiment except for the button part 260 added. Therefore, overlappingdescription other than the button part 200 is omitted.

Hereinafter, the mobile terminal 100 coupled with the terminal case 200is described with reference to FIG. 26. The mobile terminal 100 includesa case coupling sensing unit 142 for sensing the approach of thecoupling detection magnet 250 mounted at the button part 260. Moreover,the case coupling sensing unit 142 may be a hall sensor. The hall sensormay be disposed at a position corresponding to the center of the buttonpart 260. That is, the hall sensor may be disposed at the firstdirection center of the mobile terminal 100.

Hereinafter, referring to FIG. 28, a positional relationship between themagnetic bodies 265N and 265S coupled with the button part 260 and thecase coupling sensing unit 142 is described.

FIG. 28A is a view when the first polar magnet 265N having the N pole isadjacent to the inside of the detection area of the case couplingsensing unit 142 and FIG. 28B is a view when the second polar magnet265S having the S pole is adjacent to the inside of the detection areaof the case coupling sensing unit 142.

The button part 260 is movable along the first direction. As shown inFIG. 28A, as the button part 260 moves to the right, the second polarmagnet 265S becomes away from the case coupling sensing unit and thefirst polar magnet 265N becomes closer to the case coupling sensing unit142. When the button part 260 slides all the way to the right, the firstpolar magnet 265N exists in the detection area of the case couplingsensing unit 142. The case coupling sensing unit 142 may detect themagnetic field of the first polar magnet 142. Hereinafter, the positionof the button part 260 when the magnetic field of the first polar magnet142 is sensed by the case coupling sensing unit 142 is called a firstposition of the button part 260. The button part 260 may be fixed at thefirst position by the elastic protrusion 266. The principle that theposition is fixed by the elastic protrusion 266 is identical to that inthe sliding and fixing of the lens cover 240 according to the firstembodiment of the present invention. Therefore, its overlappingdescription is omitted.

Moreover, when a user presses the outer part 264 to the left and thusbutton part 260 slides to the left as shown in FIG. 28B, the secondpolar magnet 265S enters the sensing area of the case coupling sensingunit 142. At this point, the position of the button part 260 is called asecond position. Moreover, the button part 260 may be fixed at thesecond position by the elastic protrusion 266. The principle that theposition is fixed by the elastic protrusion 266 is identical to that inthe above. Therefore, its overlapping description is omitted.

Moreover, according to whether the button part 260 is disposed at thefirst position or the second position and whether the lens cover 240 isopened or closed, a preset user interface may be displayed on thedisplay unit 151 of the mobile terminal 100 or a preset application maybe executed.

That is, the control unit 180 may execute a preset application ordisplay a preset user application on the basis of the sensinginformation received from the lens cover sensing unit 141 and theposition information on the button part 260 received from the casecoupling sensing unit 142.

Hereinafter, various operating methods of the mobile terminal 100 aredescribed on the basis of the open/close information on the lens cover240 and the position information on the button part 260.

First, referring to FIG. 29, an example of setting a flash operatingmode when a camera application is in execution is described. FIG. 29 isa flowchart for illustrating such an example.

The control unit 180 determines whether a lens cover is opened on thebasis of the sensing information of the lens cover sensing unit 141 inoperation 5331.

Additionally, the control unit 180 determines whether the button part260 is disposed at the first position or the second position on thebasis of the sensing information of the case coupling sensing unit 142in operation 5332.

If it is determined that the lens cover is opened and the button part260 is disposed at the first position, the control unit 180 sets an autoflash mode in operation 5333. Then, the control unit 180 executes acamera application in the auto flash mode. That is, when entering thecapture mode described in the first embodiment, a flash is automaticallyset to the auto flash mode. For reference, when the flash is in the autoflash mode, if it is determined that there is no sufficient light bysensing the amount of light around, the flash may operate automatically.

However, if it is determined that the lens cover is opened and thebutton part 260 is disposed at the second position, the control unit 180sets a manual flash mode in operation 5334. Then, the control unit 180executes a camera application in the auto flash mode. That is, whenentering the capture mode described in the first embodiment, the flashis set to the manual flash mode. Accordingly, even if there is nosufficient light during capturing, the flash does not operateautomatically and is only operated by a user's manipulation.

Moreover, when the lens cover 240 is opened and a camera application isexecuted, the mobile terminal may operate in an augmented reality mode.That is, according to the position of the button part 260, when the lenscover 240 is opened, the control unit 180 may execute the cameraapplication in one of a normal capture mode or an augmented realitymode. FIG. 30 is a flowchart for illustrating such an example.

Hereinafter, referring to FIG. 30, entering an augmented reality modeduring the execution of a camera application is described.

First, the control unit 180 determines whether a lens cover is opened onthe basis of the sensing information of the lens cover sensing unit 141in operation 5341.

Additionally, the control unit 180 determines whether the button part260 is disposed at the first position or the second position on thebasis of the sensing information of the case coupling sensing unit 142in operation S342.

If it is determined that the lens cover is opened and the button part260 is disposed at the first position, the control unit 180 executes anormal capture mode in operation 5343. That is, an interface for one ofthe capture mode and the camera preview mode described in the firstembodiment is displayed on the display unit 151.

If it is determined that the lens cover is opened and the button part260 is disposed at the second position, the control unit 180 executes anormal capture mode in operation 5344. For example, when the cameraapplication is executed, information on a background building may bedisplayed on the display unit 151 by turning on a GPS.

Moreover, when the lens cover 240 is opened, as entering the capturemode, the mobile terminal may be set to execute a capturing regionmarking mode. FIG. 31 is a flowchart for illustrating such an example.

Hereinafter, referring to FIG. 31, when the camera application isexecuted by opening the lens cover, one of the normal capture mode andthe photographing display mode is selected. This is described with anexample.

First, the control unit 180 determines whether a lens cover is opened onthe basis of the sensing information of the lens cover sensing unit 141in operation 5351.

Additionally, the control unit 180 determines whether the button part260 is disposed at the first position or the second position on thebasis of the sensing information of the case coupling sensing unit 142in operation 5352.

If it is determined that the lens cover is opened and the button part260 is disposed at the first position, the control unit 180 executes thecamera application in the normal capture mode in operation 5353. At thispoint, entering the normal capture mode means entering the capture modedescribed in the first embodiment.

However, if it is determined that the lens cover is opened and thebutton part 260 is disposed at the second position, the control unit 180executes the camera application in the capturing region marking mode inoperation 5354.

As entering the capturing region marking mode, the control unit 180obtains current position information by turning on a GPS and displaysthis information during photographing. Additionally, the capturedpicture may be stored together with the position information. That is,location based service may be provided to the captured picture.

Moreover, when the lens cover 240 is opened, the mobile terminal mayexecute the camera application in the normal capture mode or may enterthe camera lock mode to limit the execution of the camera application.FIG. 32 is a flowchart for illustrating such an example.

Hereinafter, referring to FIG. 32, when the camera application isexecuted by opening the lens cover, one of the normal capture mode andthe camera lock mode is selectively executed. This is described with anexample.

First, the control unit 180 determines whether a lens cover is opened onthe basis of the sensing information of the lens cover sensing unit 141in operation 5361.

Additionally, the control unit 180 determines whether the button part260 is disposed at the first position or the second position on thebasis of the sensing information of the case coupling sensing unit 142in operation 5362.

If it is determined that the lens cover is opened and the button part260 is disposed at the first position, the control unit 180 executes thecamera application in the normal capture mode in operation 5363.

On the other hand, if it is determined that the lens cover is opened andthe button part 260 is disposed at the second position, the control unit180 enters a cameral lock mode in operation 5364. That is, even when thelens cover 240 is opened, the camera application is not executed.Accordingly, when the mobile terminal is in use, even if a user opensthe lens cover 240 by mistake, the execution of the cameral applicationmay be limited.

Moreover, when the lens cover 240 is opened, as entering the capturemode, the mobile terminal may preset a frequently used photo effect andthen may automatically execute the preset effect. FIG. 33 is a flowchartfor illustrating such an example.

Hereinafter, referring to FIG. 33, when the camera application isexecuted by opening the lens cover, one of the normal capture mode andthe capture mode reflecting a preset photo effect is selectivelyexecuted. This is described with an example.

First, the control unit 180 determines whether a lens cover is opened onthe basis of the sensing information of the lens cover sensing unit 141in operation 5371.

Additionally, the control unit 180 determines whether the button part260 is disposed at the first position or the second position on thebasis of the sensing information of the case coupling sensing unit 142in operation 5372.

If it is determined that the lens cover is opened and the button part260 is disposed at the first position, the control unit 180 executes thecamera application in the normal capture mode in operation 5373.

However, if it is determined that the lens cover is opened and thebutton part 260 is disposed at the second position, the control unit 180selects the capture mode reflecting a preset photo effect and executesthe camera application in operation S374.

Third Embodiment

Referring to FIGS. 34 and 35, a mobile terminal assembly according tothe third embodiment of the present invention includes a mobile terminal100 and a separate terminal case 200 detachable from the mobile terminal100.

FIG. 34 is a perspective view illustrating the terminal case 200according to the third embodiment of the present invention. FIG. 35 is aperspective view when the terminal case 200 is coupled with the mobileterminal 100 according to the third embodiment of the present invention.

The terminal case 200 includes a terminal coupling part 210 allowing themobile terminal 100 to be detachable and a front cover part 220 foldablycoupled with the terminal coupling part 210 to cover the front of themobile terminal 100. Additionally, the terminal case 200 furthercomprises a connection part 290 connecting the terminal coupling part210 and the front cover part 220.

When each configuration of them is described in more detail, theterminal coupling part 210 may be identical to that in one of the firstembodiment and the second embodiment.

The front cover part 220 may be formed of a plate member having a formcorresponding to the front of the mobile terminal 100. The front coverpart 220 includes a front incision part 221. The front incision part 221is formed by incising a portion of the front cover part 220.Accordingly, a user may see an image or video displayed on the displayunit 151 of the mobile terminal 100 and may perform a touch inputthrough the front incision part 221.

The front cover magnet 222 may be mounted at the front cover part 220.When the front cover magnet 222 is mounted at the front cover part 220,changes in the magnetic field occur as the front cover 220 is opened orclosed. This may be detected by the mobile terminal 100.

Additionally, a surface of the front cover part 220 contacting the frontof the mobile terminal 100 may be processed to prevent staticelectricity thereby preventing an unintended touch input of a user. Astatic electricity preventing material may be applied or a staticelectricity preventing film may be attached to the front cover part 220,so as to prevent static electricity.

Hereinafter, a structure of the mobile terminal 100 according to thethird embodiment of the present invention will be described withreference to FIGS. 35 and 36. The mobile terminal 100 includes a frontcover sensing unit 143 for sensing whether the front cover part 220 isopened or closed.

As shown in FIG. 36, the mobile terminal 100 includes a display panel151, a touch input unit 131, a printed circuit substrate 182, a frontcover sensing unit 143. Except for the front cover sensing unit 143added, the mobile terminal 100 shown in FIG. 36 has a structure similaror identical to that of the mobile terminal in the first embodiment.Therefore, their overlapping description is omitted.

Moreover, FIG. 35 is a schematic perspective view of the front coversensing unit 143. This is for illustrating a schematic position of thefront cover sensing unit 143 in the mobile terminal 100 and the positionof the front cover sensing unit 143 is shown more clearly in FIG. 36.The front cover sensing unit 143 is mounted on the printed circuit board182. For reference, FIG. 36 is a sectional view taken along a line C-Cof FIG. 35.

The front cover sensing unit 143 may detect a state change of the frontcover part 220 through a change in magnetic field.

The connection part 290 connects the terminal coupling part 210 and thefront cover part 220. Accordingly, one end of the connection part 290 iscouple with the terminal coupling part 210 and the other end is coupledwith the front cover part 220. The connection part 290 is formed of aflexible material. Accordingly, while the mobile terminal 100 is coupledwith the terminal coupling part 210, the rear of the front cover part220 may be disposed at the position contacting the front of the mobileterminal 100 or may rotate about 180° and thus the front of the frontcover part 220 may be disposed at the position contacting the rear ofthe terminal coupling part 210.

Hereinafter, an interface provided by a mobile terminal and a terminalcase is described with reference to FIGS. 37 and 38.

The mobile terminal 100 has a first user interface mode and a seconduser interface mode. Additionally, the display unit 151 of the mobileterminal 100 includes a first display area 410 where an image isdisplayed in the first user interface mode and a second display area 420where an image is displayed in the second user interface mode.

The first display area 410 may be an area corresponding to the frontincision part 221 of the front cover part 220 or a predetermined area inan area corresponding to the front incision part 221, and the seconddisplay area 420 may be an entire active area of the display unit 151.Accordingly, the first display area 410 may be a portion of the seconddisplay area 420. Moreover, an area corresponding to the front incisionpart 221 means an area overlapping the front incision part 221 when thefront cover part 220 covers the display unit 151 at the front of themobile terminal 100.

In the first user interface mode, the control unit 180 provides a firstuser interface in the first display area 410.

The first user interface mode is an operating mode of the mobileterminal 100 providing a user interface through the front incision part221 of the front cover part 220 when the front cover part 220 of theterminal case 200 is closed. In the first user interface mode, themobile terminal 100 may receive a touch input through the first displayarea 410. Accordingly, even when the front cover part 220 of theterminal case 200 is closed, a user may view a displayed image orperform a touch input. Additionally, the control unit 180 of the mobileterminal 100 may obtain a sound input through the microphone 122 in thefirst user interface mode.

Moreover, in the first user interface mode, the control unit 180 stopsdisplaying an image in an area 420 other than the first display area 410and limits a touch input. That is, when it is possible to turn on/offsome pixels of the display unit 151, the control unit 180 may turn offpixels in an area other than the first display area 410 in the firstuser interface mode. Or, when it is impossible to turn on/off somepixels of the display unit 151, the control unit 180 may display theouter of the first display area 210 as block color.

Moreover, as entering the first user interface mode, the control unitmay ignore a touch signal inputted through an area other than the firstdisplay area 410.

The second user interface mode is an operating mode of the mobileterminal 100 providing a second user interface through an entire activearea of the display unit 151 when the front cover part 220 of theterminal case 200 is opened or the mobile terminal 100 is separated fromthe terminal case 200.

Switching between the first user interface mode and the second userinterface mode may be performed based on the sensing information of thefront cover sensing unit 143.

That is, the control unit 180 receives detection information on thefront cover sensing unit 143 and enters the first user interface mode ifit is determined that the front case is closed. In this case, the firstuser interface is provided through the first display area 410.

On the other hand, the control unit 180 receives detection informationon the front cover sensing unit 143 and enters the second user interfacemode if it is determined that the front case is opened. In this case,the second user interface is provided through the second display area420.

Accordingly, even when the front cover part 220 of the terminal case 10is closed, a user may perform various operations, for example, receivinga call, playing music, or checking the weather.

Additionally, when an event that needs to be notified to a user occurs,for example, when a call or text messaging is incoming, sinceapplications corresponding to events are executed in the first userinterface mode, a user may check various events without opening thefront cover part 220 of the terminal case 200.

Moreover, when the second user interface mode switches into the firstuser interface mode, the control unit 180 may continuously operate theapplication executed in the second user interface mode. The control unit180 may adjust the execution screen of the application to correspond tothe first display area 410 if necessary, so that the application may beexecuted continuously in the first display area 410. Or, even if thecontrol unit 180 continuously executes the application executed in thesecond user interface mode, it may not display the application on thedisplay unit 151 in the first user interface mode. Or, the control unit180 may overlay the first user interface on the second user interface.At this point, the control unit 180 may receive a user input and on thebasis of the received user input, may determine the transparency of thefirst user interface. The control unit 180 may display the second userinterface through the first user interface by adjusting thetransparency.

However, since the control unit 180 provides the first user interface incorrespondence to the front incision part 221, according to a specificembodiment of the present invention, the control unit 180 may limit aspecific function of a specific application in the first user interfacemode. Especially, when the front cover part 220 is closed and the frontcamera is unavailable, the control unit 180 may limit a video callrelated function. Or, since a touch area is limited in the first userinterface mode, the control unit 180 may limit functions requiring atouch input of a relatively large area. An example of limiting afunction by the control unit 180 may include the text writing andsending of a text application by a touch input, the phone numbersearching and favorite phone number sensing of a call application by atouch input, and the music searching of a music application by a touchinput. However, unlike a touch input, the control unit may obtain asound input without restriction in the first user interface mode.Accordingly, when such functions are executed based on a sound input,the control unit 180 may not limit such functions.

Additionally, the size or position of the first display area 410 may bechanged by a user. FIG. 38 is a view when the size or position of thefirst display area 410 is changed. Accordingly, even if the size ofposition of the front incision part 221 is changed by replacing theterminal case 200, the first display area 410 may be set to correspondto the new front incision part 221.

A method of the control unit 180 to receive a user input so as to changethe size or position of the first user interface includes a method ofreceiving a touch input for moving a graphic representing the firstdisplay area 410 displayed on the display unit 151 or changing the size.Moreover, the control unit 180 may set the position and size of thefirst display area 410 or the first user interface on the basis of anumeric input on the size and coordinates from a user.

Moreover, light sources providing light to the display unit 151 may bedifferently turned on or turned off in the first user interface mode andthe second user interface mode.

Moreover, the size and position of the front incision part 221 of thefront cover part 220 may vary according to a type and design of theterminal case 200. Additionally, a color or pattern of the terminal case200 may be changed diversely. Accordingly, the control unit 180 maychange the feature of the first user interface. The feature of the firstuser interface includes at least one of the position, size, backgroundcolor, and a background image of the first user interface.

Accordingly, the mobile terminal 100 may display the first userinterface not being restricted from any kind of the terminal case 200.That is, the mobile terminal 100 may operate being combined with variouskinds of terminals cases 200 having different designs. Additionally, thecontrol unit 180 may change a background color or a background image ofthe first user interface, so that it may provide a sophisticated andaesthetic interface.

Additionally, the control unit 180 may receive a user input for changingthe feature of the first user interface and on the basis of the receiveduser input, may change the feature of the first user interface.

In order to change the size or position among the features of the firstuser interface, the control unit 180 may receive a touch input formoving a graphic representing the first display area 200 displayed onthe display unit 151 or changing the size. Or, the control unit 180 mayobtain a numeric input on the position and size of the first userinterface directly from a user.

Or, the control unit 180 may recognize the identifier of the terminalcase 200 and may change the feature of the first user interface on thebasis of the identifier specifying the kind of the terminal case 200. Inmore detail, the mobile terminal 100 includes a feature table for firstuser interface information and the control unit 180 may match theidentifier of the terminal case 200 to the feature table. The featuretable includes features of a plurality of user interfaces respectivelycorresponding to the identifiers of the terminal cases 200. The controlunit 180 may change the feature of the first user interface according toa matching result.

In a specific embodiment, the control unit 180 may specify a type of theterminal case 200 by recognizing the identifier of the terminal case 200on the basis of a Near Field Communication (NFC) tag in the terminalcase 200. In more detail, when the terminal case 200 including an NFCtag is coupled with the mobile terminal 100, the short rangecommunication module 114 may receive the identifier of the terminal case200 from the NFC tag. The control unit 180 may recognize the identifierof the terminal case 200 by receiving it from the short rangecommunication module 114.

Moreover, the control unit 180 may recognize the identifier of theterminal case 200 on the basis of QR code in the terminal case 200. TheQR code, as a matrix bar code representing information in a black andwhite plaid pattern, may contain 3-dimensional various information inadvantage of a large capacity compared to an existing bar codecontaining limited information such as product price and name due to alimited capacity. The camera 121 may generate an image including QR codeby capturing the QR code. The control unit 180 may extract the QR codefrom the generated image. The control unit 180 may recognize theidentifier of the terminal case 200 on the basis of the extracted QRcode.

Moreover, the control unit 180 may change the feature of the first userinterface on the basis of a resistance value in the terminal case 200.At this pint, the terminal case 200 may include a resistor. In moredetail, the sensing unit 140 may detect a resistance value of a resistorin the terminal case 200. In more detail, the sensing unit 140 maysupply voltage to the resistor in the terminal case 200. At this point,the sensing unit 140 may detect a resistance value of a resistor byusing the magnitude of a current flowing in the resistor. In moredetail, the mobile terminal 100 includes a feature table for first userinterface information and the control unit 180 may change the feature ofthe first user interface by matching the detected resistance value tothe feature table. The feature table includes features of a plurality ofuser interfaces respectively corresponding to the identifiers of theterminal cases 200. The feature of the first user interface includes atleast one of the position, size, background color, and a backgroundimage of the first user interface.

Moreover, the control unit 180 may determine one of the background coloror background image of the first user interface on the basis of magneticfield value according to a magnetic material mounted at the terminalcase 200. At this pint, a magnetic material may be mounted at theterminal case 200. The sensing unit 140 may include a plurality of hallsensors disposed at different positions to detect magnetic field. Thecontrol unit 180 may change the feature of the first user interfaceaccording to the magnitude of a magnetic filed detected by the pluralityof hall sensors.

Moreover, the control unit 180 may change the feature of the first userinterface on the basis of a color of the terminal case 200. In moredetail, the sensing unit 121 may generate an image including the colorof the terminal case 200 by capturing it. The control unit 180 maydigital-signal-process the generated image to extract the color of theterminal case 200. The mobile terminal 100 includes a feature table forfirst user interface information and the control unit 180 may change thefeature of the first user interface by matching the background color tothe feature table. The feature table includes features of a plurality ofuser interfaces respectively corresponding to a plurality of colors. Thefeature of the first user interface includes at least one of theposition, size, background color, and a background image of the firstuser interface.

FIG. 39 is a view when the control unit 180 of a mobile terminalselectively turns on/off a light source of a backlight unit of a displayunit according to a user interface mode.

The backlight unit of the display unit 151 may include a plurality oflight sources dividing and lightening a display area of the display unit151. The control unit 180 may turn on/off at least one of the lightsources according to a current user interface mode.

That is, when a current user interface mode is the first user interfacemode, the control unit 180 turns on at least one light source in an areacorresponding to the first user interface among a plurality of lightsources, and turns off at least one light source in the remaining areaother than the area corresponding to the first user interface. When acurrent user interface mode is the second user interface mode, thecontrol unit 180 turns on at least one light source in an areacorresponding to the first user interface. Through this, the battery ofthe mobile terminal 100 may be saved.

As shown in FIG. 39, the display area of the display unit 151illuminated by a light source of a backlight unit of the display unit151 is divided into two areas. In the first user interface mode, lightsources lightening an area 430 including a first display area 410 areturned on and light sources lightening an area 450 other than the area430 are turned off. According to a specific embodiment of the presentinvention, the number of light sources and a display area illuminated bya light source may vary.

Additionally, in order to save the battery of the mobile terminal 100,the brightness of an area of the display unit 151 where the first userinterface is displayed in the first user interface mode may beseparately set different from the brightness of the display unit 151 inthe second user interface mode by a user setting. That is, thebrightness of the display unit 151 in the first user interface mode maybe set darker than that in the second user interface. When the batteryremaining of the mobile terminal 100 is insufficient, the control unit180 may reduce the brightness of an area of the display unit 151 wherethe first user interface is displayed in the first user interface modein order to save power.

The first user interface and an operation of the mobile terminal 100through this are described in more detail below.

Hereinafter, an operating method of a mobile terminal according to astate change of the front cover part 220 of the terminal case 200 willbe described with reference to FIGS. 40 and 41 in accordance to thethird embodiment of the present invention.

FIG. 40 is a flowchart illustrating operations of a mobile terminal whena state of the front cover part 220 of a terminal case is changed.

The front cover sensing unit 143 detects a state change of the frontcover part 220 of the terminal case 200 in operation 5101. A state ofthe front cover part 220 includes a state changing from an opened stateinto a closed state and a state changing from a closed state to anopened state.

The control unit 180 determines whether the current display unit 151 isturned on in operation 5103. If a partial area of the display unit 151is turned on, it is determined that the display unit 151 is turned on.

The control unit 180 determines a current user interface mode accordinga state of the front cover part 220 and whether the display unit 151 isturned on.

When the current display unit 151 is turned on and a state of the frontcover part 220 changes from an opened state into a closed state, thecontrol unit 180 determines a current user interface mode as a firstuser interface mode. That is, the control unit 180 executes anapplication through the first display area 410. At this point, a basicapplication of the first user interface mode in execution may be changedby a user's selection.

For example, a clock application may be a basic application. Or, a basicapplication of the first user interface mode may be the last executedapplication in the first user interface mode. However, while a musicplayer application 510 plays music, the control unit 180 may execute themusic player application 510 when determining a user interface foruser's convenience regardless of a basic application. The control unit180 stands by while maintaining the first user interface mode for apredetermined time. The predetermined time for standing by may bechanged by a user's setting. The predetermined time for standing by maybe more than several sec and less than 1 min and may be 10 secpreferably. If there is no additional user input with the predeterminedtime for standing by, the control unit 180 turns off the display unit151. If the battery remaining of the mobile terminal 100 isinsufficient, the control unit 180 may reduces the standing by time tosave power.

When the current display unit 151 is turned off and a state of the frontcover part 220 changes from an opened state into a closed state, thecontrol unit 180 does not perform an additional operation.

When a state of the front cover part 220 changes from a closed stateinto an opened state regardless of whether the display unit 151 isturned on, the control unit 180 determines a current user interface modeas a second user interface mode. Since the front cover part 220 does notcover the display unit 151, a user may use the front of the display unit151.

While the control unit 180 executes an application in the first userinterface mode, if the first user interface mode changes into the seconduser interface mode, the control unit 180 may adjust a screen of thecurrently running application to the second user interface mode whilecontinuously executing the currently running application.

FIG. 40 is a view when a display screen of a display unit where a cameraapplication is executed is changed as a case cover is opened and closed.

As shown in the left of the drawing, a user interface displayed throughan entire display unit is reduced to a size and position correspondingto a front incision part as the front cover part 220 is closed.

Accordingly, as described in the first embodiment, according to whetherthe lens cover 240 is opened or closed, an image displayed on thedisplay unit 151 is displayed only through a first display area 410 whenthe front cover part 220 is closed and is displayed only through asecond display area 420 when the front cover part 220 is opened.

Applications executed in the first user interface mode and operations ofeach application are described with reference to FIGS. 42 to 45.

FIG. 42 is a view illustrating a lock screen in the first user interfacemode and the second user interface mode.

The left of FIG. 42 is a typical lock screen requiring a pattern inputin the second user interface mode. The right of FIG. 42 is a lock screenrequiring a pattern input smaller than that in the second user interfacemode. Since the first and second user interfaces have a difference inthe size of a display area, each may set a different lock screen to fitfor its size. In a specific embodiment, even when the lock screen of thesecond user interface mode uses a lock screen using a pattern input, alock screen of the first user interface may use a lock screen using apassword.

FIG. 43 illustrates another example of a user interface.

The memory 160 may store a plurality of applications executable in thefirst user interface mode. That is, a user may execute variousapplications in the first user interface mode. According to anotherembodiment of the present invention, a user may execute a music playerapplication 510, a clock application 520, a weather forecast application530, and an image viewer application 540. That is, a user may executethe music player application 510, the clock application 520, and theweather forecast application 530 without opening the front cover part220 of the terminal case 200 in the first user interface mode.Accordingly, a user may save a time and operation necessary forexecuting an important application of a mobile terminal.

The control unit 180 may switch an application executed in the firstuser interface mode into another application. Such switching may beperformed by a user input. At this point, a kind of user input includesa touch input, a button input, and a voice input. Especially, the touchinput may include dragging in a first direction, flicking, and sliding.The first direction may be a horizontal direction of a mobile terminal.Especially, the button input may include a menu button input or a cancelbutton input.

Additionally, an application executed in the first user interface modemay include a plurality of pages. The control unit 180 may switch eachpage of an application by a user input. At this point, a kind of userinput includes a touch input, a button input, and a voice input.Especially, the touch input may include dragging in a directiondifferent from the first direction, flicking, and sliding. The directiondifferent from the first direction may be a vertical direction of amobile terminal. Especially, the button input may be a volume buttoninput. The voice input may be an input having voice data different froma user input for switching an application.

The clock application 520 may include a plurality of pages. The clockapplication 520 in FIG. 43 may display a base city of a currentlydisplayed time and a time for another city, or may include N pageshaving different graphic styles.

The weather forecast application 530 may include a plurality of pages.According to the embodiment of FIG. 13, the weather forecast application530 may display a currently displayed weather forecast and weatherforecast for another city, or may include N pages having differentgraphic styles.

Notification operations of applications executed in the first userinterface mode are described with reference to FIGS. 44 and 45.

FIG. 44 is a flowchart illustrating operations of a mobile terminal whenan event that needs to be notified to a user occurs with a closed frontcover part of a mobile terminal case in the mobile terminal according toanother embodiment of the present invention.

The control unit 180 recognizes that an event that needs to be notifiedto a user occurs in operation 5501. The event that needs to be notifiedto a user is an event requiring a notification, that is, when some dataare received by a user or which state the mobile terminal 100 is inneeds to be notified. A specific example of the above event includesreceiving a phone call, receiving a text message, or reaching apredetermined time set by an alarm application or a timer application.

The control unit 180 determines whether the current display unit 151 isturned on in operation 5503.

If the current display unit 151 is not turned on, the control unit 180turns on the display unit 151 in operation 5505.

The control unit 180 determines a current user interface mode as thefirst user interface mode in operation 5507.

The control unit 180 notifies a corresponding event to a user byexecuting an application corresponding to an event through the firstuser interface mode in operation 5509. Since such events that need to benotified to a user are displayed through a first user interface, a usermay confirm important information without opening the front cover part220 of a mobile terminal. That is, a user may save a time and operationnecessary for checking in formation on a mobile terminal.

FIG. 45 is a view illustrating an operation of a call application in auser interface according to another embodiment of the present invention.

When the mobile terminal 100 receives a call while the front cover part220 of the terminal case 200 in the mobile terminal 100 is closed, thecontrol unit 180 executes a call application through the first displayarea.

FIG. 45(A) is a view when a typical call is incoming. A call applicationdisplays a name, a phone, number, and a picture, that is, sender'sinformation. Additionally, a user may receive or reject the call througha first display area 410. That is, a user may receive or reject the callwithout opening the front cover part 220 of the terminal case 200. Inmore detail, the control unit 180 may obtain a swipe touch input throughthe first display area 410 and accordingly, may receive or reject thecall. Or, the control unit 180 obtains a user's button input andaccordingly, receives or rejects the call. At this point, the positionof a button is not limited and especially, may be disposed at the rearof the mobile terminal 100. Or, the control unit 180 obtains a user'svoice input and accordingly, receives or rejects the call. When thefront cover part 220 of the terminal case 200 includes a touch inputavailable area, the control unit 180 may receive or reject the call byreceiving a touch input through the touch input available area. If thereis a privacy protection setting, the control unit 180 allows a callapplication to display sender's information only when obtaining anadditional user input.

FIG. 45(B) is a view when a user talks to the other party through atypical call. When a user closes the front cover part 220 of the mobileterminal 100 during a call, as described with reference to FIG. 45(B),the control unit 180 switches a user interface mode into the first userinterface mode. At this point, the call application displays the name,phone number, picture, and current call time of the other party on thecall. Additionally, the call application displays a message that thefront cover part 220 of the terminal case 200 needs to be opened to useseveral call options. If there is no user's touch input or button inputfor predetermined time, the call application turns off the entiredisplay unit 151.

FIG. 45(C) is a view when multiple calls are incoming. The callapplication displays information on the multiple calls and a messagethat the front cover part 220 needs to be opened to use a multiple calloption. In addition to the incoming multiple calls, when a video call isincoming, the call application displays information on the multiplecalls and a message that the front cover part 220 needs to be opened touse a video call option in the first user display mode.

FIG. 45(D) is a view when the front cover part 220 is opened during acall with the closed front cover part 220. The control unit 180 mayadjust the size of an application screen to fit for the first userinterface as switching the second user interface mode into the firstuser interface mode. That is, the control unit 180 adjusts the screensize of the call application to the size of the entire display unit 151.

Additionally, the control unit 180 may obtain a voice input in the firstuser interface mode and on the basis of the obtained voice input, mayperform functions, for example, phone book search, the latest outgoingnumber sending, and phone book favorite sending. As described above, avoice input is not limited unlike a touch input in the first userinterface mode. Accordingly, as the control unit 180 executes variousfunctions of a call application on the basis of the obtained voiceinput, a user's convenience is improved.

When a text is received in the first user interface mode, it operates asfollows. When the front cover part 220 of the terminal case 200 isclosed and another application is not displayed in a first display mode,a text messaging application is executed in the first user interfacemode. At this point, according to an embodiment of the presentinvention, the text messaging application may display the sender,content, date, and time of the received text message. The text messagingapplication may display some or all of contents on a text message or maynot display contents on a text message and display only a fact that atext message is received. While another application is displayed in thefirst user interface mode, if a text message is received, the controlunit 180 may display a text message reception through an icon in ascreen of an application in execution or a pop-up window. At this point,the control unit 180 may obtain a user input and on the basis of theobtained user input, may execute various functions of the text messagingapplication. Especially, the user input may be a touch input or a voiceinput. In the first user interface mode, the control unit 180 obtainsonly a touch input through the front incision part 221 or a touch inputthrough a partial area of the front cover part 220. Accordingly, if thecontrol unit 180 obtains a voice input instead of a touch input andexecutes a function of a text messaging application, a user'sconvenience may be improved.

An alarm application and a timer application's alarm operation in thefirst user interface mode are as follows.

As a user set time is reached, if an alarm application needs to notifyit to a user, the alarm application is executed in the first userinterface mode. A user may stop or snooze the alarm through the firstuser interface without opening the front cover part 220 of the terminalcase 200. That is, a user may stop or snooze the alarm by touching thefirst display area 410. At this point, the user input may be a touchinput or a voice input.

As a predetermined time elapses, if a timer application needs to notifyit to a user, the time application is executed in the first userinterface mode. A user may stop a timer through the first user interfacewithout opening the front cover part 220 of the terminal case 200. Thatis, a user may stop a timer by providing a touch input to the first userinterface.

Operations of a mobile terminal relating to a first user interfaceduring an external button input, for example, a power button and avolume button, are described with reference to FIGS. 46 and 47.

FIG. 46 is a view illustrating a user interface displayed when a userlong-presses a power button as a front cover part of a mobile terminalcase coupled with the mobile terminal is closed according to anotherembodiment of the present invention.

The long press input is an input of continuously pressing a button formore than a predetermined time. In contrast, the short press input is aninput of continuously pressing a button for less than a predeterminedtime.

When a front cover part of a mobile terminal case coupled with a mobileterminal is closed, if a user provides a short press input on a powerbutton, an operation of the mobile terminal is as follows. The sensingunit 140 detects the short press input of the power button. When theshort press input of the power button is detected, the control unit 180determines whether a current display unit is turned on. If the currentdisplay unit 151 is turned on, the control unit 180 turns off thedisplay unit 151. If the current display unit 151 is not turned on, thecontrol unit 180 turns on the display unit 151. Since the front coverpart 220 of the terminal case 200 is closed, the control unit 180determines a current user interface mode as the first user interfacemode. That is, an application is executed through the first userinterface. At this point, a basic application of the first userinterface in execution may be changed by a user's selection. Or, a basicapplication of the first user interface may be the last executedapplication in the first user interface mode. According to an embodimentof the present invention, the clock application 500 may be the basicapplication. However, while a music player application 510 plays music,the control unit 180 may execute the music player application 510 whendetermining a user interface in order for user's convenient useregardless of a basic application.

When the front cover part 200 of the mobile terminal 100 is closed and auser provides a long press input on a power button, the control unit 180executes a power application through the first user interface. At thispoint, the running power application provides power off, power off andrestart, and plane mode switching functions. A user may control thepower of the mobile terminal 100 by selecting one of the above functionsthrough a touch input on the first user interface 200. Accordingly, auser may turn off the power of the mobile terminal 100 easily or mayswitch a mode of the mobile terminal 100 into a plane mode withoutopening the front cover part 220 of the terminal case 200.

FIG. 47 is a view illustrating a user interface displayed when a userprovides a volume button input as a front cover part of a mobileterminal case is closed according to another embodiment of the presentinvention.

FIG. 47(A) illustrates a first user interface as a user presses a volumekey when the front cover part 220 of the terminal case 200 is closedduring a call. The control unit 180 adjusts a call volume according tothe volume key input of a user and displays its numerical value on afirst display area through a first user interface.

FIG. 47(B) illustrates a first user interface as a user presses a volumekey when the front cover part 220 of the terminal case 200 is closed andthe music player application 510 plays music. The control unit 180adjusts a music playback volume according to the volume key input of auser and displays its numerical value on a first display area through afirst user interface.

FIG. 47(C) illustrates a second user interface as a user presses avolume key when the front cover part 220 of the terminal case 200 isclosed and the music player application 510 plays music. The controlunit 180 may adjust the size of an application screen to fit for thefirst user interface as switching the second user interface mode intothe first user interface mode. That is, the control unit 180 adjusts thescreen size of the music player application 510 to the size of theentire display unit 151.

Additionally, the control unit 180 may obtain a user's voice input andon the basis of the obtained voice input, may execute a music searchfunction in addition to next track playback, playback, and pause.

Various embodiments described herein may be realized in a computer ordevice similar thereto readable recording medium by using software,hardware, or a combination thereof.

Moreover, the terminal coupling part 210 in the terminal case 200 mayhave forms as shown in FIGS. 48 to 50.

Referring to FIG. 48, the terminal case 200 includes a terminal couplingpart 210 allowing the mobile terminal 100 to be detachable and a frontcover part 220 foldably coupled with the terminal coupling part 210 tocover the front of the mobile terminal 100. Additionally, the terminalcase 200 further comprises a connection part 290 connecting the terminalcoupling part 210 and the front cover part 220.

The terminal coupling part 210 may have a band-shaped member extendingin a horizontal direction. The terminal coupling part 210 has a form inwhich a central part extends flat and bends toward the front around theleft and right end parts and protrudes. The terminal coupling part 210may be formed of an elastically deformable material, for example, metal.The distance between the left and right end parts of the terminalcoupling part 210 is formed to be narrower than the horizontal width ofthe mobile terminal 100. Accordingly, when the mobile terminal 100 iscoupled, the left and right end parts are elastically deformed andopened. After the mobile terminal is coupled, the left and right endparts of the mobile terminal 100 are pressed inwardly by elasticrestoring force. Therefore, a coupling state between the mobile terminal100 and the terminal coupling part 210 may be maintained.

Since a configuration and function of the front cover part 220 includingthe front incision part 221 and the connection part 290 are identical tothose in the embodiment of FIG. 1, their overlapping descriptions areomitted.

FIG. 49 is a perspective view illustrating the terminal case 200according to another embodiment of the present invention. FIG. 50 is aperspective view when a stylus pen 10 and a mobile terminal 100 arecoupled with the mobile terminal case 200 of FIG. 49.

Referring to FIGS. 49 and 50, the terminal case 200 includes a terminalcoupling part 210 allowing the mobile terminal 100 to be detachable anda front cover part 220 foldably coupled with the terminal coupling part210 to cover the front of the mobile terminal 100. Additionally, theterminal case 200 further comprises a connection part 290 connecting theterminal coupling part 210 and the front cover part 220.

As shown in FIGS. 49 and 50, since a configuration and function of theterminal coupling part 210 and the front cover part 220 are identical tothose in the embodiment of FIG. 48, their overlapping descriptions areomitted. Only the connection part 290 that is different from FIG. 48 isdescribed.

Referring to FIG. 49, the connection part 290 connects the terminalcoupling part 210 and the front cover part 220. Accordingly, one end ofthe connection part 290 is couple with the terminal coupling part 210and the other end is coupled with the front cover part 220. Theconnection part 290 is formed of a flexible material. Theforward-backward direction of the connection part 290 is formed to belonger than the forward-backward direction width of the coupled mobileterminal 100. Accordingly, when the front cover part 220 covers thefront of the mobile terminal 100, the connection part 290 may bend tohave a semicircular or elliptical cross-section. Then, the bent innerspace forms a stylus pen receiving part. Referring to FIG. 50, thestylus pen 10 is coupled with the inner space formed by bending theconnection part 290.

Although embodiments have been described with reference to a number ofillustrative embodiments thereof, it should be understood that numerousother modifications and embodiments can be devised by those skilled inthe art that will fall within the spirit and scope of the principles ofthis disclosure. More particularly, various variations and modificationsare possible in the component parts and/or arrangements of the subjectcombination arrangement within the scope of the disclosure, the drawingsand the appended claims. In addition to variations and modifications inthe component parts and/or arrangements, alternative uses will also beapparent to those skilled in the art.

1-50. (canceled)
 51. A mobile terminal assembly comprising: a terminalcase having a incision part; and a mobile terminal detachable from theterminal case; a lens cover configured to open and close the incisionpart, wherein the mobile terminal comprises: a display unit; a cameramodule disposed at a position corresponding to the incision part; a lenscover sensing unit configured to sense whether the lens cover is openedor closed; and a control unit configured to execute a camera applicationon the basis of whether the lens cover is opened or closed, wherein thecontrol unit is configured to: execute the camera application when thelens cover is opened in a state where the display unit is turned on, andto terminate the camera application and display, through the displayunit, a user interface displayed before the camera application isexecuted, when the opened lens cover is closed in a state where thecamera application is being executed.
 52. The mobile terminal assemblyaccording to claim 51, wherein the control unit is configured to: turnon the display unit and execute the camera application, when the lenscover is opened in a state where the display unit is turned off, andterminate the camera application and turn off the display unit, when theopened lens cover is closed in a state where the camera application isbeing executed.
 53. The mobile terminal assembly according to claim 51,wherein execution of the camera application displays, through thedisplay unit, any one of a capture mode interface in which capturing bya user input is possible or a camera preview mode interface in which auser input is limited.
 54. The mobile terminal assembly according toclaim 53, wherein the camera preview mode interface comprises a capturemode interface and a lock release interface provided to release a screenlock state.
 55. The mobile terminal assembly according to claim 54,wherein the control unit is configured to display the capture modeinterface through the display unit, when the lens cover is opened instates where the display unit is turned on and where a screen lock isnot set, and display the camera preview mode interface through thedisplay unit, when the lens cover is opened during a call in a statewhere the display unit is turned on and the screen lock is not set. 56.The mobile terminal assembly according to claim 53, wherein the controlunit is configured to perform a preset number of capturing operationsautomatically, when the lens cover is opened in a state where thedisplay unit is turned on and a screen lock is not set.
 57. The mobileterminal assembly according to claim 56, wherein the control unit isconfigured to perform capturing, when a preset time elapses afterreceiving a signal for opening the lens cover.
 58. The mobile terminalassembly according to claim 53, wherein the control unit is configuredto select a camera preview mode to display a camera preview modeinterface on the display unit, when the lens cover is opened in a statewhere the display unit is turned off and a screen lock is set.
 59. Themobile terminal assembly according to claim 53, wherein the control unitis configured to select a capture mode to display a capture modeinterface on the display unit, when the lens cover is opened in a statewhere the display unit is turned off and a screen lock is not set. 60.The mobile terminal assembly according to claim 53, wherein the controlunit is configured to maintain the display unit as it is, when theopened lens cover is closed in a state where a camera application is notbeing executed.
 61. The mobile terminal assembly according to claim 53,wherein the control unit is configured to display a preset messagethrough the display unit, when the lens cover is closed in a state wherea camera application is executed.
 62. The mobile terminal assemblyaccording to claim 61, wherein the control unit is configured to displaya preset animation through the display unit, when a signal for openingthe lens cover is received after the message is displayed.
 63. Themobile terminal assembly according to claim 51, wherein the lens coversensing unit comprises a hall sensor that senses a magnetic field of alens cover magnet disposed at the lens cover of the terminal case. 64.The mobile terminal assembly according to claim 51, wherein the terminalcase further comprises: a terminal coupling part coupled to the mobileterminal to cover a rear of the mobile terminal, a front cover partrotatably coupled to the terminal coupling part and having a frontincision part, wherein the control unit is configured to display thecamera application in a region corresponding to the front incision partof the display unit, when the front cover part is closed.
 65. The mobileterminal assembly according to claim 64, wherein the incision part isformed in the terminal coupling part
 210. 66. The mobile terminalassembly according to claim 51, wherein the lens cover comprises anouter part disposed at an outer side of the terminal case, an inner partdisposed at an inner side of the terminal case at an interval from theouter part, and a middle part disposed between the outer part and theinner part, the lens cover is configured to be capable of sliding in afirst direction, the middle part has a length in a second directionperpendicular to the first direction, wherein the length is shorter thana length of the outer part and a length of the inner part, and at leasta portion of the terminal case is configured to be interposed betweenthe outer part and the inner part.
 67. The mobile terminal assemblyaccording to claim 51, further comprising a lens cover mounting part 230formed at the terminal case, wherein the lens cover mounting part isformed in such a manner that an inner surface of the terminal case isstepped outwardly, a protrusion insertion groove is formed at thestepped portion of the lens cover mounting part, and the lens covercomprises an elastic protrusion capable of being inserted into theprotrusion insertion groove.
 68. The mobile terminal assembly accordingto claim 51, further comprising a button part movably coupled to theterminal case, wherein a first polar magnet that has a first polarityand a second polar magnet that has a second polarity different from thefirst polarity are coupled to the button part while being spaced apartfrom each other.
 69. The mobile terminal assembly according to claim 68,wherein the mobile terminal further comprises a case coupling sensingunit that senses a position of the button part of the terminal casethrough magnetic fields of the first and second polar magnets.
 70. Themobile terminal assembly according to claim 69, wherein the control unitis configured to: to determine the position of the button part as afirst position when the magnetic field of the first polar magnet issensed by the case coupling sensing unit, and to determine the positionof the button part as a second position when the magnetic field of thesecond polar magnet is sensed by the case coupling sensing unit, whereinthe control unit is configured to: to execute the camera application ina flash auto mode when the button part is disposed at the first positionand the lens cover is opened, and to execute the camera application in aflash manual mode when the button part is disposed at the secondposition and the lens cover is opened.